Top 100 Nutritionists 2026

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.