Top Nutrition and Fitness Influencers Experts 2025

Certified nutritionist and fitness trainer and founder of Quarter to Fitness, a women-focused wellness brand promoting sustainable fitness and balanced nutrition for women 25+.

As a NASM Certified Nutrition Coach (CNC) at Same Day Supplements, I specialize in providing science-backed, personalized nutrition guidance to help individuals achieve their health and fitness goals. With expertise in dietary planning, supplement strategies, and performance nutrition, I work to empower clients with practical tools for lasting results. My approach blends evidence-based knowledge with real-world application, ensuring sustainable habits that support both everyday wellness and peak athletic performance.

My name is Archna Sharma, and I have been working in the fitness field for the last nine years. Fitness has always been a big part of my life, and I love helping people become healthier and more confident. In 2022, I started Fitness Fasto so I could share easy-to-follow workouts, simple nutrition tips, and practical fitness advice that anyone can use in their daily life. Today, I have a strong online community, including 90K+ followers on Instagram, active followers on Threads, and fitness content shared on Medium and Pinterest. My business is also listed on Google, and my website fitnessfasto.com is where I share my programs and fitness guidance. My goal is to make fitness simple, enjoyable, and possible for everyone—no matter their age or lifestyle.

As a Registered Dietitian I am trained in all aspects of nutrition, from the biochemistry of nutrients to the social & cultural factors that influence food choices. I provide nutrition coaching as well as medical nutrition therapy to help manage chronic diseases such as diabetes, heart disease, & obesity using the latest scientific evidence. My work has been featured in outlets such as Women's Health, Reader's Digest, Business Insider, Popsugar, Eat This Not That, SRQ Magazine, Sarasota Magazine, SNN, & more.​ Experience: Bright Body Nutrition, Owner & Registered Dietitian Sarasota Memorial Healthcare System, RENEW Lifestyle Medicine Program Coordinator Education: Tulane University, RDN Florida State University, BS Additional Certifications: Integrative & Functional Nutrition, DIFM Lifestyle Medicine Coaching, ACLM

I’m a registered clinical dietitian and transformation coach who helps busy professionals lose fat and build muscle through evidence-based nutrition and training. My programs have been featured in Business Insider, GQ, and Esquire, and I’ve coached over 180 clients globally—including high-level executives, founders, and frequent travelers.

Alisia Agostinelli, RD, is a registered dietitian/nutritionist in Montreal. A graduate of the University of Montréal and HEC Montréal, she specializes in using evidence based data to find practical adjustments that make a difference to her clients health. She uses a non-diet, weight-inclusive approach in her nutrition therapy practice. Alisia is an active member of her community and is implicated in numerous projects aimed at increasing access to health care for all.

I’m Stephanie Hnatiuk, Registered Dietitian, Running Coach/Personal Trainer, and the creator and host of The Fuel Run Recover Podcast. I specialize in breaking down the science of sports nutrition and running performance into clear, practical strategies runners can use every day. With more than a decade of experience working with endurance athletes, I help runners optimize their performance and body composition using an evidence-based, data-driven approach. My work has been featured across multiple media platforms, including television, print, and digital outlets. I’ve provided expert commentary for local and national TV news segments, appeared in national and international running publications, and contributed to numerous health and performance articles focused on nutrition, weight loss, nutrition, hydration science, and the unique needs of endurance athletes. I’ve also been interviewed as a guest on a variety of podcasts within the running, fitness, and nutrition space, offering insights on everything from marathon nutrition strategies to helping runners reach their weight loss goals. As an athlete myself, I bring a relatable and grounded perspective to every interview and partnership opportunity. My background includes thousands of hours of 1:1 work with runners, extensive experience interpreting genetic nutrition testing results, and years of speaking at workshops, webinars, and corporate wellness events. I’m known for translating complex scientific concepts into engaging, easy-to-understand guidance, something my podcast audience consistently praises and that has helped The Fuel Run Recover Podcast grow into a trusted resource for runners seeking reliable, actionable information. When I’m not recording or speaking, you’ll find me training for my next race or creating educational content for my online community at @steph.the.runners.dietitian.

I am a fitness trainer who specializes in field of fitness and yoga more than 10years, and also help to motivate people for fitness. I writes with empathy and accuracy and has a knack for connecting with readers in an insightful and engaging way. I contributes regularly to FreakToFit.

Amanda Brink Hull grew up just outside of Fenton, Iowa on a small acreage where she was raised with her three younger sisters. Their upbringing was rooted in hands-on experiences; working in their father’s two huge gardens, caring for the family’s chickens, and learning the art of deer hunting. These experiences instilled in Amanda a deep respect for nature, an understanding of the importance of nutritious food, and a strong work ethic; principles that serve as the foundation of her values today. Amanda and her husband, Josh, now live full-time in Florida but remain connected to their Iowa roots. They have two grown children—a daughter working in real estate in Iowa and a son playing collegiate baseball near Chicago. Both enjoy cooking and leading active lifestyles. Amanda holds certifications in nutrition, personal training, and health coaching, along with a Master’s degree in Industrial and Organizational Psychology. She has served on various boards from Iowa to Washington, DC, and has spoken at national conferences alongside Dr. Mehmet Oz. Because of her passion and dedication for overall health, Amanda was nominated to serve as a Hearst Wellness Champion from 2018 to 2021, in addition to her role as General Sales Manager at the Hearst CBS affiliate in Des Moines, IA. Currently, she volunteers as a wellness advocate, serving on the WellWorks! Committee at Strategic America. Amanda founded Hull Health in 2020, initially sharing wellness tips, workout ideas, and healthy recipes through social media. Since then, the mission has evolved to address the vital healthcare needs of individuals, organizations, and communities. She’s excited to release her latest book, Rooted: The Down-to-Earth Basics of Wellness, coming August 2025. Visit the Books page to pre-order your copy and see the full list of upcoming author events.

​Lisa Ackerman is a board-certified functional medicine nutritionist and the founder of Well Fed Wellness, where she guides clients towards better health with science-backed, judgment-free coaching. She holds an M.S. in Human Nutrition from the University of Bridgeport and is completing a Doctor of Clinical Nutrition at Maryland University of Integrative Health. She specializes in gut health, mental health, and metabolic health and loves that a job exists where she can talk about food and nutrition all day long.

Silvija Meilunaite, PN1-NC, CSMC, is a certified nutrition and menopause coaching specialist who writes about midlife health, nutrition, and evidence-based wellness. She focuses on research-driven approaches to feeling better in your 40s and beyond, with a special interest in low-tox living and supportive daily habits.

Jackie Newgent, RDN, CDN, is a distinguished culinary nutrition expert and thought leader who seamlessly bridges the worlds of professional cooking and nutritional science. As a classically trained chef and registered dietitian, she has established herself as a preeminent voice in plant-forward cuisine and innovative food education. With multiple award-winning cookbooks and a robust media presence, Newgent has emerged as a highly sought-after authority in culinary nutrition and wellness. A respected industry influencer, Jackie serves on the Forbes Health advisory board and leverages her extensive expertise as a national media personality and contributor to national health platforms like U.S. News & World Report. Her professional journey includes an impressive tenure as a chef instructor at the prestigious Institute of Culinary Education in New York City. Currently, she continues to shape culinary education as an instructor at The Gourmandise School in Santa Monica and through her private teaching. Newgent's professional portfolio extends beyond traditional roles, serving as a nutrition coach for My Peak Challenge and a strategic culinary nutrition advisor to major food companies and emerging plant-centered businesses. Her multifaceted approach to nutrition and cooking has positioned her as a unique and influential professional who is reshaping how we understand the intersection of food, health, and sustainability. Based in Los Angeles, Jackie continues to inspire and educate through her dynamic work across media, education, and culinary innovation.

Plant-based raw food expert with 16+ years of personal practice backed by 21+ years of medical records. Seven-time marathoner. Founder of Raw Foodiest coaching platform. Publishing IN NATURE WE TRUST manifesto March 2026. I teach energy-based health principles grounded in real-world results, not recipes.

I'm not your typical nutritionist. I teach busy women science-based tools, to self-manage their energy, focus, weight, gut, and hormone health ...so that they look, feel, and work well. I offer science-based Nutrition and Lifestyle advice that's been proven to work. 1:1 consults, on-line classes, and as a keynote speaker. In organisations, I speak on all thing's wellness (Work + Well series). Curated for professionals these are designed to empower people with the tools they need to stay well. Current seminars are: . Fuel your success (How to get the energy you need to succeed) . Stress RX (Resilience Remedies) . Work-Life-Hormone Balance (Female-specific advice for all ages including Perimenopause & beyond). I do all of this while continuing to contract in senior Project roles - so I live what I teach daily. You'll also find me at the Auckland Executive Club as President in a volunteer role - a not-for-profit club that exists to develop women of all ages, groups, industries and backgrounds in business.

Dr. Rimas Geiga is a distinguished professional with a diverse skill set, serving as a Medical Doctor, Registered Dietician, and Clinic Nutritionist. With a solid foundation in healthcare, he plays a pivotal role as a private advisor to a consortium of companies operating in the health and wellness sector, offering valuable insights and strategic guidance. In addition to his advisory role, Dr. Geiga is actively engaged in hospital work, bringing his expertise to the forefront of patient care. His commitment to providing quality healthcare is evident in his contributions to the medical field, where he tirelessly works to enhance the well-being of those under his care. Beyond his medical pursuits, Dr. Geiga finds joy in various hobbies that contribute to his well-rounded personality. An avid enthusiast of culinary arts, he explores the world of flavors through his cooking endeavors. Dr. Geiga also embraces an active lifestyle, indulging in cycling adventures that not only promote physical fitness but also reflect his passion for outdoor activities. Wine tasting stands out as another of Dr. Geiga's interests, where he enjoys unraveling the complexities of different varietals and appreciating the artistry behind each bottle. His love for travel allows him to explore diverse cultures, further broadening his perspectives and enriching his experiences. Dr. Rimas Geiga's multifaceted professional background, combined with his dedication to health and wellness, showcases a holistic approach to his career. His commitment to patient care, coupled with a vibrant array of hobbies, underscores his well-balanced and dynamic presence in both the medical and personal spheres of life.

Ashley Kitchens, MPH, RDN, LDN, is a nationally recognized plant-based dietitian, spokesperson, and nutrition consultant. Ashley founded her company "Plant Centered Nutrition" with the intention of providing approachable plant-based nutrition information to her clients, community, and media audience. Ashley is regularly seen in national media outlets such as Fox News, VegNews, Vegetarian Times, Eating Well, The Times Weekly, Forbes, Newsweek, and Health.com, providing comments and education on various nutrition related topics. She is a trusted source with over 10 years of experience practicing as a plant-based dietitian. She also partners and collaborates with plant-based friendly brands through social media, speaking engagements, her podcast, and many more platforms. Ashley grew up on an Angus cattle farm in small-town Indiana. As you might guess, meat and dairy were a big part of daily life. Unfortunately, so were GI issues like chronic constipation. For years, Ashley was told to manage her issues with medication instead of considering the food she was putting into her body. Ashley earned her Masters of Public Health and Nutrition from the University of North Carolina at Chapel Hill and became a registered dietitian in 2012. But, even after all that, her GI issues didn’t completely go away. It wasn’t until she did personalized research to dive deep into her own life and her own eating habits that she noticed a significant change. For her, this meant transitioning to a plant-based lifestyle. After that transition, she knew there were others who could benefit from a diet filled with more plants. She also knew it was critical for the coaching they received to be based on a deep understanding of their unique situation. That’s when she realized why she became a dietitian. Ashley made it her mission to help others transition to a plant-centered way of eating through a holistic approach and intuitive eating practices. Let's connect: Instagram: @plantcenterednutrition Pinterest: Plant Centered Nutrition Facebook: Plant Centered Nutrition Podcast: Plant Centered and Thriving Youtube: Plant Centered Nutrition

Maria Lucey is a Registered Dietitian and one of the most recognizable nutrition voices on YouTube, known for simplifying evidence-based nutrition into clear, practical advice that anyone can use. Her fast-growing online platform spans YouTube, Instagram, and her recipe-focused blog, where she shares balanced, accessible nutrition guidance and healthy meals that actually fit real life. Maria has been featured in EatingWell, LoseIt, and other major outlets, and she brings nearly a decade of clinical experience across multiple settings. She holds a First-Class Honors degree in Human Nutrition & Dietetics from Trinity College Dublin and is known for her warm, relatable style that makes nutrition feel understandable, doable, and genuinely enjoyable.

On the quest to find the best way to forever health& fitnessExercise Physiologist (ESSA), Nutritionist, Strength and Conditioning Coach (ASCA), Sports Coach (SMA), Personal Trainer, FitGenes practitioner, Matrix Fitness Australia master trainer

I’m a qualified Nutritional Therapist and Personal Trainer, specialising in realistic, science-based nutrition and lifestyle coaching. My approach is designed for busy lives, looking at how you can make health simple and realistic. I’ve been through my own health journey and have been running my own nutrition practice for over a year. I specialise in female health, hormones, gut health and, burnout. I help my clients address all of these concerns whilst still living fulfilling lives.