The FitBodega 100
Top 100 Nutritionists 2026
The world's leading credentialed nutritionists and dietitians — ranked. Sports RDs, researcher-practitioners, clinical leaders, and the registered dietitians winning the internet.
Reviewed monthly · Updated 2026-08-04
How we rank
The Nutrition Authority Score
One hard gate: recognized credentials — registered dietitian status or graduate-level nutrition science — plus real practice with clients, athletes, teams, or clinics. Famous but uncredentialed voices do not qualify.
Reach is log-scaled and recomputed from researched follower counts. The five judgment factors — credibility, practice, content, impact, consistency — are calibrated across research segments so no category is scored on an easier curve. Counts marked verified were browser-checked at the listed date; the rest are approximate.
Details are editorial estimates (2026) and the ranking is reviewed monthly. Educational and editorial — inclusion is not an endorsement, rankings measure influence and authority, and nothing here is dietary advice.
The ranking
The 100
001Louise Burke
Sports & Performance DietitiansResearcher81
PhD, APD; Professor and Chair in Sports Nutrition, Mary MacKillop Institute, Australian Catholic University; 30 years as Head of Sports Nutrition / Chief of Nutrition Strategy at the Australian Institute of Sport.
Australian Olympic team dietitian across five Games (1996-2012); 350+ peer-reviewed papers, editor of the International Journal of Sport Nutrition and Exercise Metabolism; awarded the Order of Australia for her contribution to sports nutrition.
002Megan Rossi
Clinical & Specialty Practice78
RD, PhD (King's College London); founder and director of The Gut Health Clinic (London and Manchester) and research fellow at King's.
Runs a real gut-health clinic and an active research fellowship at the same time, with published work (50+ papers) underpinning a large public-education platform.
003Tim Spector
Research & Clinical LeadersResearcher77
MD, PhD — Professor of Genetic Epidemiology at King's College London; pivoted a career in twin and microbiome research into founding ZOE.
Turned twin-study and microbiome findings into the most-listened diet-science podcast and one of the largest personalized-nutrition programs in the world; nutrition is now his full-time research focus, which is why he clears the specialization gate.
004Rujuta Diwekar
International & Celebrity Practice76
Postgraduate degree in Sports Science & Nutrition (SNDT College, Mumbai, 1999) plus Sports Dietitians training at the Australian Institute of Sport; longtime nutritionist to Bollywood stars and the Indian cricket team.
Set the template for mainstream Indian diet advice for two decades and reaches a bigger audience than almost any dietitian outside the anglosphere, without paid endorsements.
005Will Bulsiewicz
Clinical & Specialty Practice74
MD; dual board-certified in internal medicine and gastroenterology; US Medical Director at ZOE personalized-nutrition platform.
A practicing GI physician, not a self-taught influencer, whose Fiber Fueled work reset mainstream fiber and gut-health messaging at mass scale.
006Alan Aragon
Evidence-Based Educators & Myth-BustersResearcher74
MS in Nutrition Science; founder of the Alan Aragon Research Review, one of the longest-running peer-vetted nutrition/fitness research digests, plus a history of consulting physique and combat athletes.
Set the template for research-literate fitness nutrition writing that dozens of later newsletters copied; still active and cited after decades.
007Tim Noakes
International & Celebrity PracticeResearcher74
MD and Professor Emeritus of Exercise & Sports Science, University of Cape Town; decades of research on carbohydrate and fat metabolism in endurance athletes.
Co-created the low-carb 'Banting' diet movement that reshaped South African eating habits, and was twice cleared of professional misconduct over his public advice.
South Africa's health regulator (HPCSA) brought a professional-conduct case over his public low-carbohydrate infant-feeding advice in 2014; he was acquitted in 2017 and the regulator's appeal was dismissed in 2018.
008Asker Jeukendrup
Sports & Performance DietitiansResearcher73
PhD; Director of Mysportscience Ltd, an independent sports-science and nutrition consultancy; 30 years as researcher, educator and practitioner, including a period leading Gatorade Sports Science Institute research.
His carbohydrate-oxidation and multiple-transportable-carbohydrate research reshaped modern endurance fueling protocols now standard across pro cycling and running.
009Evelyn Tribole
Clinical & Specialty Practice72
MS, RDN; co-creator of the Intuitive Eating framework, trainer of over 2,600 certified counselors worldwide, international speaker.
Co-authored the book that defined an entire clinical counseling approach now certified and practiced globally.
010Rhiannon Lambert
Social-Media Dietitians72
BSc, MSc, Registered Nutritionist (RNutr); founder of the Rhitrition clinic in London and Sunday Times bestselling author.
The UK's highest-profile registered nutritionist, running an actual multi-practitioner clinic alongside books and two podcasts.
011Dr. Sarah Berry
Evidence-Based Educators & Myth-BustersResearcher72
PhD, Professor of Nutritional Sciences at King's College London; lead scientist on ZOE's PREDICT studies, one of the largest personalized-nutrition research programs.
PREDICT's scale (100,000+ participants) gives her population-level impact rare among nutrition researchers, and she communicates it directly to the public.
012Renee McGregor
Sports & Performance Dietitians72
Registered Dietitian (HCPC), clinical and performance nutrition specialist; dietitian for GB Olympic (2012), Paralympic (2016) and Commonwealth Games (2018) teams.
Leading global voice on RED-S and the female athlete; bestselling author (Training Food, Fast Fuel, Orthorexia) bridging endurance performance and eating-disorder care.
013Dr. Stacy Sims
Research & Clinical LeadersResearcher72
PhD in Exercise Physiology and Nutrition Science — adjunct senior lecturer at the University of Waikato; consults with elite female athletes and teams.
Built the female-specific sports-nutrition field largely from scratch; ROAR and Next Level rewired how women train and fuel.
014Marie Spano
Sports & Performance Dietitians72
MS, RD, CSCS, CSSD; sports dietitian for the Washington Nationals and Atlanta Hawks, previously the Atlanta Braves (2017-2022, World Series champions 2021) and Atlanta Falcons.
One of the most tenured active pro-team dietitians in the US, spanning MLB, NBA and NFL; lead author of the textbook Nutrition for Sport, Exercise and Health.
015Dr. Walter Willett
Research & Clinical LeadersResearcher71
MD, DrPH — Professor of Epidemiology and Nutrition at Harvard T.H. Chan School of Public Health; ran the Nurses' Health Study and co-chaired the EAT-Lancet Commission on planetary diets.
The most-cited nutrition scientist alive; his cohort work and Healthy Eating Plate reshaped dietary guidelines worldwide.
016James Collins
Sports & Performance Dietitians71
SENr-registered performance nutritionist; founder of Performance Nutrition, longtime nutrition consultant to Arsenal FC and England Rugby.
One of the most established practitioner names in elite UK football and rugby nutrition, with a multi-decade consultancy client list of pro clubs and national teams.
017Alberto Cormillot
International & Celebrity Practice71
MD (Universidad de Buenos Aires, 1961) with postgraduate training in Geneva; specializes in nutrition and obesity treatment.
Built Argentina's modern obesity-treatment infrastructure — clinics, self-help groups, and a foundation now active across several countries — over more than 60 years.
018Dr. David Ludwig
Research & Clinical LeadersResearcher70
MD, PhD — endocrinologist at Boston Children's Hospital/Harvard Medical School; runs an obesity-prevention clinic and developed the carbohydrate-insulin model of obesity.
Bridges bench research and a working clinic; his insulin-carb framework reset the low-fat-vs-low-carb debate.
019Dr. Marion Nestle
Research & Clinical LeadersResearcher70
PhD, MPH — Paulette Goddard Professor Emerita of Nutrition, Food Studies and Public Health at NYU; author of Food Politics.
Defined food-industry-influence scholarship; decades of books and her Food Politics blog still set the agenda for nutrition-policy debate.
020Nancy Clark
Sports & Performance Dietitians70
MS, RD, CSSD; private sports-nutrition practice near Boston since the 1980s.
Author of Nancy Clark's Sports Nutrition Guidebook, one of the field's most widely used reference texts across multiple editions; trained a generation of sports RDs.
021Iris Shai
International & Celebrity PracticeResearcher70
PhD in nutrition and epidemiology, RD, MPH; professor at Ben-Gurion University and Reichman University, adjunct at Harvard T.H. Chan School of Public Health.
Her DIRECT and DIRECT-PLUS randomized trials reshaped the global low-carb-vs-Mediterranean-diet debate and guideline discussions, with 23,000-plus citations.
022Fan Zhihong
International & Celebrity PracticeResearcher70
PhD in Food Science; professor and doctoral advisor at China Agricultural University, director at the China Nutrition Society.
China's most-followed nutrition science communicator, with a Weibo following in the millions and a role as the national science association's go-to nutrition voice.
023Dr. Stuart Phillips
Evidence-Based Educators & Myth-BustersResearcher69
PhD, Professor of Kinesiology at McMaster University; the field's leading voice on dietary protein and muscle protein synthesis, especially in older adults.
His body of work has directly shaped protein-intake guidance worldwide — a field-leading researcher whose findings changed practice, not just opinion.
024Susan Kleiner
Sports & Performance Dietitians69
PhD, RD, FACN, CNS; consults with professional and Olympic athletes and strength/physique competitors.
Author of Power Eating, a foundational strength-and-physique sports-nutrition text now in multiple editions, with decades of continuous elite-athlete consulting.
025Jean-Michel Cohen
International & Celebrity Practice69
MD and PhD in nutrition (Université Paris Diderot, 1983); runs the Savoir Maigrir coaching program and clinics out of Paris.
Forty years of French TV presence, a National Order of Merit for a food-labeling system, and a coaching program that scaled his practice to millions of dieters.
France's medical board (Ordre des médecins) sanctioned Cohen in 2015 for advertising and commercial-practice violations tied to his nutrition program; the penalty was reduced to a fine on appeal in 2017.
026Elyse Resch
Clinical & Specialty Practice68
MS, RDN, CEDS-S; co-creator of Intuitive Eating, eating-disorder specialist with over 40 years in private practice.
The clinical-practice half of the Intuitive Eating partnership, still seeing clients and training eating-disorder specialists.
027Vanessa Rissetto
Social-Media Dietitians68
MS, RDN; co-founder and CEO of Culina Health, a large multi-dietitian telehealth practice, and still sees patients herself.
Built one of the largest RD-led care practices in the US, scaling credentialed 1:1 nutrition care rather than just content.
028Susie Burrell
Social-Media Dietitians68
Accredited Practising Dietitian; former dietitian to NRL clubs Parramatta Eels and St George Illawarra Dragons, now a remote-consulting dietitian.
Twelve years as Sunrise's resident dietitian plus a podcast with 3M+ downloads make her one of Australia's most established mainstream nutrition voices.
029Graeme Close
Sports & Performance DietitiansResearcher68
PhD; Professor of Human Physiology, Liverpool John Moores University; nutrition consultant to England Rugby and the PGA European Tour.
Bridges academic research on vitamin D, protein and player welfare with hands-on consultancy for elite rugby and golf, frequently cited in UK sports-science media.
030Kate Scarlata
Clinical & Specialty Practice67
MPH, RDN; Boston-based digestive-health dietitian specializing in IBS, SIBO and low-FODMAP care; co-author of The Complete Low-FODMAP Diet.
The clinical dietitian most associated with bringing the Monash low-FODMAP research into mainstream IBS care, with 30+ years in digestive-health practice.
031Dr. Bill Campbell
Evidence-Based Educators & Myth-BustersResearcher67
PhD; directs the Performance & Physique Enhancement Laboratory at the University of South Florida, running real studies on contest-prep and body recomposition with physique athletes.
Bridges academic research and practice directly — his lab's contest-prep studies are widely cited across bodybuilding and physique-sport nutrition.
032Carlos Ríos
International & Celebrity Practice67
Degree in Human Nutrition & Dietetics (Universidad Pablo de Olavide, Seville); registered dietista-nutricionista; founder of the Realfooding movement and MyRealFood app.
Built the biggest food-literacy movement in the Spanish-speaking world, a 4.5M-strong community, even as peer dietitians criticize its traffic-light simplifications.
033Aitor Sánchez García
International & Celebrity Practice67
Dietista-Nutricionista and food technologist (Universidad de Alicante, with honors; Universidad de Granada); doctoral researcher who has worked at Sweden's Karolinska Institutet.
Runs both a clinical practice and 'Mi Dieta Cojea,' one of the most cited evidence-based nutrition outlets in the Spanish-speaking world.
034Leslie Bonci
Clinical & Specialty Practice66
MPH, RDN, CSSD, LDN; sports-nutrition consultant, past dietitian for the Pittsburgh Steelers and Kansas City Chiefs, current consultant to Carnegie Mellon athletics and Pittsburgh Ballet Theatre.
One of the longest-serving, most credentialed pro-team sports dietitians in the US, still actively consulting for elite teams and performing-arts companies decades in.
035Dr. Federica Amati
Research & Clinical Leaders66
Registered Nutritionist (ANutr) with a PhD — Head Nutritionist at ZOE and Clinical Lead for Nutrition at Imperial College Health Partners.
Translates population science into daily clinical and consumer guidance at scale; author of a bestselling nutrition-myth book.
036Abbey Sharp
Social-Media Dietitians66
Registered Dietitian (Toronto), runs Abbey's Kitchen media brand, host of the Bite Back podcast.
One of the longest-running, highest-production RD channels online; myth-busting videos and a bestselling book give her outsized field visibility.
037Dr. Valter Longo
Research & Clinical LeadersResearcher66
PhD in Biochemistry — Professor of Gerontology and Biological Sciences at USC and Director of the USC Longevity Institute; developed the Fasting-Mimicking Diet.
Turned lab longevity research into a clinically tested dietary intervention now used in hospitals and licensed commercially.
038Christy Harrison
Social-Media Dietitians66
Registered Dietitian, MPH, Certified Eating Disorders Specialist (CEDS); journalist turned intuitive-eating coach and author.
Her book Anti-Diet is widely cited as a movement-defining text; long-running Food Psych / Rethinking Wellness podcasts shaped anti-diet nutrition media.
039Jose Antonio
Sports & Performance DietitiansResearcher66
PhD; co-founder and CEO of the International Society of Sports Nutrition (ISSN), professor at Nova Southeastern University.
Runs the field's leading professional/research society and its position stands on protein and supplementation, shaping how sports-nutrition guidelines are written and cited worldwide.
040Martin MacDonald
Evidence-Based Educators & Myth-Busters65
SENr-registered nutritionist running Mac-Nutrition Uni and a clinical practice that has worked with British elite athletics and rugby programs.
One of the few names on this list whose day job is fueling actual elite teams, not just talking about it online.
041Dr. Spencer Nadolsky
Evidence-Based Educators & Myth-Busters65
DO, board-certified in obesity medicine and lipidology; treats patients directly on weight and metabolic health and co-hosts the Docs Who Lift podcast.
A working physician-nutrition voice in the increasingly loud GLP-1/obesity-medicine conversation, grounded in an active clinical practice.
042Brenda Davis
Clinical & Specialty Practice64
RD; plant-based nutrition specialist and author who has led diabetes-nutrition programs with the Pima Nation and in the Marshall Islands.
Among the most credentialed, longest-standing plant-based dietitians, with population-level clinical program results behind the books.
043Dr. Idrees Mughal (Dr. Idz)
Evidence-Based Educators & Myth-Busters64
MBBS plus an MRes in nutrition research; UK-trained physician who debunks carnivore, vegan-extremist, and fad-diet claims at scale on YouTube, TikTok, and Instagram.
Among the highest-reach myth-busting voices in the space, using a genuine research background to fact-check viral diet claims in near-real time.
044Dr. Eric Trexler
Evidence-Based Educators & Myth-BustersResearcher64
PhD in Human Movement Science; Director of Research at MASS (Monthly Applied Science in Sport), a peer-reviewed-literature digest for coaches and dietitians.
MASS is treated as a reference standard by strength/physique coaches for staying current on primary research without wading through journals themselves.
045Dr. Christopher Gardner
Research & Clinical LeadersResearcher64
PhD — Director of Nutrition Studies at the Stanford Prevention Research Center; led the landmark DIETFITS low-fat vs. low-carb trial.
Runs some of the most rigorous, most-cited diet-comparison trials in the field.
046Trent Stellingwerff
Sports & Performance DietitiansResearcher64
PhD; sport physiologist/nutrition lead at the Canadian Sport Institute Pacific, supporting Team Canada Olympic and world-championship athletes.
Applied "mission nutrition" performance frameworks used across Canadian high-performance sport; active researcher-practitioner bridging lab science and Games-time fueling.
047Julio Basulto
International & Celebrity Practice64
Registered dietitian-nutritionist (colegiado CAT000943, Barcelona); editor of the Spanish Journal of Human Nutrition and Dietetics.
Decades of clinical practice paired with prolific myth-debunking books and talks that have shaped Spain's public nutrition debate.
048Dr. Frank Hu
Research & Clinical LeadersResearcher63
MD, PhD — Chair of the Department of Nutrition at Harvard T.H. Chan School of Public Health; leads large-scale cohort research on diet, diabetes and cardiovascular risk.
One of the most-published nutrition epidemiologists in the world; his work underpins global diabetes-prevention guidance.
049Dr. Michael Greger
Research & Clinical LeadersResearcher63
MD — founder of NutritionFacts.org, the largest free video library of evidence reviews on nutrition; author of How Not to Die.
Borderline on current clinical practice, but the scale and rigor of his evidence-synthesis library is field-defining for plant-based nutrition education.
050Dawn Jackson Blatner
Social-Media Dietitians63
RDN, CSSD; former Chicago Cubs team dietitian, now a private-practice dietitian and regular Today Show/GMA nutrition contributor.
Two-decade media career plus an elite-sports practice history; her Flexitarian Diet book shaped mainstream plant-forward eating advice.
051Keri Glassman
Social-Media Dietitians63
Registered Dietitian, founder of the Nutritious Life brand and a coach-certification program that trains other nutrition professionals.
Built a practice-plus-media-plus-training brand model that predates and influenced today's dietitian-influencer business playbook.
052Cynthia Sass
Clinical & Specialty Practice62
MPH, MA, RD, CSSD; performance dietitian who has consulted for the New York Yankees and other pro athletes; longtime Health magazine contributing nutrition editor.
A rare RD with genuine pro-sports clinical credentials paired with a two-decade national media platform.
053Jennifer Anderson
Clinical & Specialty Practice62
RD, MS in public health (Johns Hopkins); founder of Kids Eat in Color and CEO of BetterBites, digital feeding-therapy programs for families.
Runs an actual clinical treatment platform for picky eating and feeding challenges while building one of the largest pediatric-feeding audiences among credentialed dietitians.
054Dan Benardot
Sports & Performance DietitiansResearcher62
PhD, RD; professor emeritus, Georgia State University; nutrition consultant to US Olympic gymnastics and figure-skating programs.
Academic authority on energy availability and micro-periodized eating for aesthetic/weight-sensitive sports, author of the textbook Advanced Sports Nutrition.
055Jill Castle
Clinical & Specialty Practice61
MS, RDN; pediatric dietitian in private practice (Jill Castle Nutrition), author of six children's-nutrition books, host of The Nourished Child podcast.
Over 30 years translating hands-on pediatric feeding-practice work into parent-facing guidance and clinical training.
056Maya Feller
Social-Media Dietitians61
Maya Feller, MS, RD, CDN; runs a Brooklyn private practice and is a regular nutrition expert on Good Morning America.
Combines an active clinical practice with mainstream broadcast reach and a culturally-rooted nutrition book, a rare full-stack profile.
057Lyndi Cohen
Social-Media Dietitians61
Accredited Practising Dietitian (APD) and Accredited Nutritionist; "The Nude Nutritionist," TV nutritionist on Australia's Today Show.
Leading Australian anti-diet dietitian voice with a TEDx talk, podcast, and coaching programs reaching a large binge-eating-recovery audience.
058Bonnie Taub-Dix
Social-Media Dietitians61
RDN, CDN; founder of BTD Nutrition Consultants and author of Read It Before You Eat It; longtime national media spokesperson for the Academy of Nutrition and Dietetics.
Three-decade mainstream media career built consumer nutrition-label literacy at national scale, ahead of the current creator wave.
059Meghann Featherstun
Sports & Performance Dietitians61
RD, CSSD, known as "The Marathon Nutritionist"; runs a private practice and online coaching for runners at Featherstun Nutrition.
Built one of the largest audiences in run-specific fueling education, translating clinical sports-nutrition guidance into practical marathon and half-marathon fueling content.
060Antonio Paoli
International & Celebrity PracticeResearcher61
MD and Full Professor of Exercise & Sport Sciences, University of Padova; directs its Nutrition & Exercise Physiology Laboratory, with a second professorship at UCAM Murcia, Spain.
One of the most-cited researchers on ketogenic diets and athletic performance, with a body of work widely applied in sports-nutrition practice.
061Dr. Nicola Guess
Evidence-Based Educators & Myth-BustersResearcher60
Registered Dietitian and PhD, University of Oxford; researches low-carbohydrate diets and type 2 diabetes remission, with direct clinical work on diabetes nutrition.
Respected voice bridging clinical dietetics and diabetes research, known for pushing back on both low-carb hype and knee-jerk dismissals of it.
062Wendy Lopez & Jessica Jones
Social-Media Dietitians60
Two Registered Dietitians who co-host the long-running Food Heaven Made Easy podcast and brand.
Early, decade-plus voices in diet-culture-critical, culturally inclusive nutrition media; influenced the current wave of anti-diet RD podcasters.
063Chris Rosenbloom
Sports & Performance DietitiansResearcher60
PhD, RDN, CSSD; professor emerita, Georgia State University; nutrition consultant to the Atlanta Ballet and collegiate athletes.
Widely cited sports-nutrition textbook co-author and educator who helped formalize sports RD training programs in the US.
064Dr. Kevin Klatt
Evidence-Based Educators & Myth-BustersResearcher59
PhD in Nutritional Sciences (Cornell), postdoctoral researcher at UC Berkeley, and Director of Research at Examine.com.
Deep technical rigor on micronutrient and supplement science, shaping how thousands of practitioners interpret primary literature via Examine.
065Bob Seebohar
Sports & Performance Dietitians59
MS, RD, CSSD, CSCS; sports dietitian for USA Triathlon across multiple Olympic cycles, founder of Fuel4mance.
Longtime Olympic-team practitioner known for periodized/metabolic-efficiency fueling approaches adopted across endurance coaching.
066Pooja Makhija
International & Celebrity Practice59
BSc in Dietetics and MSc in Food Science & Nutrition; clinical nutritionist running a Mumbai practice for Bollywood clients and metabolic-health patients.
One of India's most visible clinical nutritionists, with an ongoing consulting practice and a bestselling book that shaped celebrity-diet coverage.
067Danny Lennon
Evidence-Based Educators & Myth-Busters58
MSc in Nutrition & Sports Performance; founder of Sigma Nutrition, a long-running evidence-based podcast and CPD education company for nutrition professionals.
One of the most consistently rigorous interview-format nutrition podcasts, widely used by dietitians and coaches for continuing education.
068Dr. Susie Burrell
Evidence-Based Educators & Myth-Busters58
Accredited Practising Dietitian (APD); runs a private clinic and hosts the Shared Plate podcast, a prominent Australian nutrition-myth-busting voice.
Leading credentialed nutrition voice in the Australian market, with a practice and media footprint that has lasted well over a decade.
069Steph Grasso
Social-Media Dietitians58
Registered Dietitian, clinically trained, now a full-time TikTok/Instagram recipe-and-nutrition-education creator.
One of the highest-reach RDs on TikTok, credited with popularizing the fast, credentialed grocery-haul/recipe format many other dietitians now copy.
070Rebecca Gawthorne
Social-Media Dietitians58
Accredited Practising Dietitian, founder of the Nourish Naturally brand.
One of the largest Instagram followings of any credentialed dietitian worldwide, built on consistent non-diet, family-nutrition content.
071Amy Goodson
Sports & Performance Dietitians58
MS, RD, CSSD; sports dietitian for the Dallas Cowboys and multiple pro and college athletic programs.
One of the more visible NFL team dietitians in US sports media, regularly quoted on pro-athlete fueling and recovery nutrition.
072Frédéric Saldmann
International & Celebrity Practice58
MD, dual-trained as a cardiologist and nutritionist, practicing out of Paris hospitals.
One of France's most consistent bestselling health authors, translating preventive-medicine research into mass-market nutrition advice for two decades.
073Dr. Gabrielle Fundaro
Evidence-Based Educators & Myth-Busters57
PhD in Human Nutrition, Foods, and Exercise; coaches clients on gut health and behavior change through an evidence-based physique coaching group.
Rare combination of gut-health research depth and applied behavior-change coaching, filling a gap most fitness-nutrition educators skip.
074Abby Langer
Social-Media Dietitians57
Registered Dietitian, private practice in Toronto and long-time nutrition writer for outlets like Self and Glamour.
Known for plain-spoken, myth-debunking commentary that pushes back on wellness-industry overreach from inside the profession.
075Stephanie Howe
Sports & Performance DietitiansResearcher57
PhD in Nutrition and Exercise Physiology, RD; former elite ultrarunner (Western States 100 champion) now consulting with endurance athletes.
Rare combination of doctoral research training, RD credential and elite athletic pedigree, giving her fueling guidance unusual credibility in the ultra-endurance space.
076Frederico Lobo
International & Celebrity Practice57
MD with a registered nutrology specialization (CRM-GO 13192, RQE 11915), certified by ABRAN; practices in Goiânia, Brazil.
Helped found the Movimento Nutrologia Brasil in 2014 and built one of Brazil's most-watched physician-led nutrition YouTube channels.
077Emily Leeming
Clinical & Specialty PracticeResearcher56
RD, PhD; nutrition scientist at King's College London, author of Genius Gut (2024).
Translates King's/ZOE gut-microbiome cohort research into clinical dietetic guidance, a newer but credentialed voice in the gut-health space.
078Dr. Adrian Chavez
Evidence-Based Educators & Myth-Busters56
PhD in Nutritional Sciences; runs a private nutrition coaching practice and hosts a long-running evidence-based nutrition podcast.
Steady, credentialed voice translating primary research for both clients and a lay audience without the hype common in the space.
079Dr. Duane Mellor
Evidence-Based Educators & Myth-Busters56
Registered Dietitian and PhD, senior lecturer at Aston University; regular British Dietetic Association spokesperson on fad diets and nutrition myths in UK media.
The go-to credentialed rebuttal voice in British press and broadcast whenever a new diet trend or misinformation claim goes viral.
080Dr. Gil Carvalho
Research & Clinical LeadersResearcher56
MD, PhD (biophysics) — physician-scientist behind Nutrition Made Simple!, an evidence-review channel fact-checking nutrition claims.
One of the few MDs doing rigorous, citation-backed myth-busting at real scale; borderline on active clinical practice, but the education work is genuinely field-shaping.
081Prof. Susan Jebb
Research & Clinical LeadersResearcher56
PhD — Professor of Diet and Population Health at the University of Oxford and Chair of the UK Food Standards Agency.
Shapes UK national nutrition and food-safety policy directly; decades advising government on obesity and diet.
082Yasi Ansari
Clinical & Specialty Practice55
MS, RDN, CSSD; sports dietitian for UCLA Athletics and national media spokesperson for the Academy of Nutrition and Dietetics.
Practices with Division I athletes while serving as the profession's own national voice in mainstream media.
083Vesanto Melina
Clinical & Specialty PracticeResearcher55
RD; co-author with Brenda Davis of foundational plant-based nutrition texts (Becoming Vegan, Becoming Raw) and a longtime plant-based dietetics educator.
Co-wrote reference texts that clinical plant-based dietetic practice still draws on today.
084Dr. Kevin Hall
Research & Clinical LeadersResearcher55
PhD (physics) — spent two decades as a senior investigator in NIH's metabolism and nutrition research group; retired from NIH in 2025 following a public dispute over research independence; current institutional role not independently confirmed here.
His controlled-feeding trials gave the first causal evidence that ultra-processed food drives overeating — the single most field-shifting nutrition experiment of the decade.
085Dr. Alan Flanagan
Research & Clinical Leaders55
PhD in Nutritional Sciences (University of Surrey) — Registered Associate Nutritionist running the Alinea Nutrition consultancy, specializing in circadian nutrition.
Rare combination of a rigorous PhD and an active client-facing practice; a leading voice against nutrition-influencer overreach.
086Prof. Barbara Rolls
Research & Clinical LeadersResearcher55
PhD — Helen A. Guthrie Chair of Nutritional Sciences at Penn State; created the Volumetrics approach to satiety and portion research.
Her food-volume/energy-density research reshaped how dietitians and the public think about fullness and portion control.
087Alan McCubbin
Sports & Performance DietitiansResearcher55
PhD; senior lecturer at Monash University and Sports Dietitians Australia member, consulting with elite triathletes and endurance athletes.
Active gut-training and carbohydrate-fueling researcher whose work informs current endurance-nutrition practice guidelines in Australia and beyond.
088Kylie Sakaida
Social-Media Dietitians54
Registered Dietitian and NYT-bestselling cookbook author behind the nutritionbykylie brand.
Among the largest personal-following RDs on Instagram; cookbook and recipe content sets a reference bar for RD-led food media.
089Niko Rittenau
International & Celebrity PracticeResearcher54
Bachelor's in nutrition counseling (DHfPG) and Master's in micronutrient therapy & regulation medicine (FHM Bielefeld); often billed as a 'nutritional scientist,' a label German media has called a stretch given his actual training.
Set the format for plant-based nutrition education in German-speaking Europe with a Spiegel-bestselling book, though he also runs a supplement business — a disclosed conflict of interest worth flagging.
090Kelly Jones
Clinical & Specialty Practice53
RD, CSSD; sports dietitian in private practice (Student Athlete Nutrition), regular contributor to Runner's World and other outlets.
Working clinical sports dietitian whose one-on-one athlete practice feeds a long-running national nutrition-journalism byline.
091Toby Smithson
Clinical & Specialty Practice53
MS, RDN, CDCES; diabetes lifestyle specialist, founder of DiabetesEveryDay, author of Diabetes Meal Planning and Nutrition for Dummies.
One of the most established diabetes-specialist dietitians, bridging one-on-one CDCES clinical counseling with widely used patient education.
092Nichole Andrews
Social-Media Dietitians53
Registered Dietitian specializing in oncology nutrition, working directly with cancer patients as the "Dietitian Cancer Coach."
Fills a genuine clinical-education gap: credentialed, practice-based guidance for cancer patients navigating nutrition myths during treatment.
093Prof. Jose Ordovas
Research & Clinical LeadersResearcher52
PhD — Director of the Nutrition and Genomics Laboratory at Tufts University's Jean Mayer USDA Human Nutrition Research Center.
Founding figure of nutrigenomics; his gene-diet interaction studies (e.g., Mediterranean-diet research) underlie the whole personalized-nutrition field.
094Angie Asche
Clinical & Specialty Practice51
RD, CSSD; founder of Eleat Sports Nutrition, working with collegiate and endurance athletes, author of Chase the Podium.
Runs a visible independent sports-dietitian practice and extends its clinical fueling work into published athlete-nutrition education.
095Kelly Pritchett
Clinical & Specialty PracticeResearcher51
PhD, RD, CSSD; sports-nutrition professor at Central Washington University and team dietitian consultant.
Combines an academic research role with hands-on team consulting, representative of the researcher-practitioner track in sports dietetics.
096Dr. Gemma Newman
Research & Clinical Leaders51
MBBS — practicing NHS GP in the UK ('The Plant Power Doctor') focused on lifestyle and plant-based nutrition in primary care.
Borderline on formal nutrition-science credentials, but an active GP practice plus consistent, credentialed public education on diet and chronic disease.
097Kylee Van Horn
Sports & Performance Dietitians51
RD specializing in trail and ultrarunning nutrition; works one-on-one with professional trail and ultra athletes.
One of the few dietitians with a dedicated ultra-endurance/trail-running client base, filling a gap most sports-nutrition figures don't cover.
098Sarah Remmer
Clinical & Specialty Practice50
RD; Alberta-based pediatric and prenatal dietitian in private practice, author and parenting-nutrition writer.
A leading Canadian clinical voice on infant, toddler and prenatal feeding, working one-on-one with families alongside her writing.
099Dr. Sumantra Ray
Research & Clinical LeadersResearcher50
Physician-scientist — founder and Chair of the NNEdPro Global Institute for Food, Nutrition and Health, a WHO-collaborating nutrition-education program spanning over 100 countries.
Built the largest cross-border nutrition-in-medicine education network, training clinicians worldwide to actually use nutrition science.
100Colleen Christensen
Social-Media Dietitians50
Registered Dietitian behind the No Food Rules brand, focused on flexible, non-restrictive eating content.
Consistent, high-volume recipe and mindset content with a large, engaged following among mainstream (non-diet) nutrition audiences.
On the radar
Bubbling Under
Researched and scored, currently outside the 100. The monthly review promotes and relegates.
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