Best Immunity-Boosting Nutrition Experts

I'm a functional nutritionist (MS, FNTP, CGP) specializing in gut health, food sensitivities, and autoimmune conditions, integrating clinical nutrition science with a biblical worldview. I help people address root causes and restore health through practical nutrition and lifestyle strategies rather than symptom management alone. I’m a regular contributor to The Epoch Times, where my essential health guides on conditions such as diverticulitis, Hashimoto’s, celiac disease, peripheral neuropathy, Crohn’s disease, rosacea, restless legs syndrome, and mast cell activation syndrome (MCAS) have been shared thousands of times by readers. I'm also the author of the international bestselling book God's Prescription: A Faith-Based Plan to Shift Your Mindset and Reclaim Your Natural Health. I work extensively with clients struggling with multiple food sensitivities, Hashimoto’s thyroiditis, celiac disease, IBS, IBD, SIBO, diverticulitis, and other inflammatory and autoimmune conditions. My focus includes intestinal permeability (“leaky gut”), the gut microbiome, blood‑sugar balance, and gluten‑free and elimination diets that are realistic for everyday life. I make complex health information understandable and provide clear, actionable natural solutions. I'm available for expert commentary on digestive health, inflammation, autoimmunity, anti-inflammatory diet and lifestyle, intestinal permeability (leaky gut), the gut microbiome, gluten-free and dairy-free diet, elimination diets, faith and wellness, and practical, evidence‑informed nutrition strategies for real people and families.

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.

​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.

Clinical Nutritionist -16 years of experienceResearch Content WriterBody image advisor for Models and ActorsMember of IDA Member of The Nutrition Society UK

Registered Dietitian | Cofounder & Chief Health Officer at Vedic Nutrition LLC I am dedicated to redefining the landscape of modern wellness. My mission is to empower individuals to achieve sustainable health through personalized, mindful nutrition strategies that honor both the body and the mind. 🌿 Specializing in: Integrative nutrition & mindful wellness. ⭐ Accessibility: We provide comprehensive telehealth visits covered by insurance to ensure expert care is available to everyone.

Jennifer Fugo, MS, LDN, CNS is a clinical nutritionist empowering adults who’ve been failed by conventional medicine to beat chronic skin and unending gut challenges. She has experience working with conditions such as eczema, psoriasis, rosacea, dandruff + hives — with clientele ranging from regular folks to celebrities + professional athletes.Jennifer also founded her own line of skincare + supplements available at www.QuellShop.com specifically for people struggling with these chronic skin issues. She holds a Master’s degree in Human Nutrition from the University of Bridgeport and is a Licensed Dietitian-Nutritionist and Certified Nutrition Specialist. Her work has been featured on Dr. Oz, Reuters, Yahoo!, CNN, and many podcasts and summits. Jennifer is a faculty member of the LearnSkin platform, an Amazon best-selling author, and the host of the Healthy Skin Show podcast.

Website. www.Renutrin.co CV: https://apps.twu.edu/my1cv/profile.aspx?type=twh&id=tSCOCmQvzxOjZUU7JCuqBQ%3D%3D Research:-How prebiotic fibers impact blood glucose outcomes and overall health. -Development of diets to improve metabolic indices and wellness. -Nutrient composition of preterm breastmilk.Other:TWU Houston Institutional Review Board (IRB) Chair 2020-2024

Founder of IngredientMD, a supplement intelligence platform powdered by most clinical data available. What's important, we communicate in language humans will understand instead. It all starts from individual ingredients instead of product name, claims, and anything else. Product is what's inside instead of what perception is being made. In our analysis of 500+ supplement products, we found 42% had at least one key ingredient below clinically studied doses. I focus on bringing evidence-based analysis to consumer supplement decisions.

Hi, I'm Dr. Jeffrey Mark, M.D., a gastroenterologist and functional medicine expert with over 30 years helping people just like you get back to feeling their best. I've dedicated my life to fixing gut health issues, balancing hormones, and tackling heart and energy problems from the root cause—not just masking symptoms with endless meds. My own story started young: At age 10, a bad infection from travel nearly took my life due to a wrong antibiotic, sparking my passion to help others avoid that pain. Later, in my 40s, I battled fatigue, weight gain, high blood pressure, and brain fog from heavy metals and mold toxicity. Using functional and regenerative medicine, I healed myself and now share those tools with you. I earned my B.S. in Neurophysiology from Northwestern University, my M.D. from the University of Illinois College of Medicine, did my internal medicine residency at Northwestern, and specialized in gastroenterology at Chicago Medical School. I'm also certified in medical acupuncture from UCLA and 5X board-certified in functional medicine, anti-aging and regenerative medicine, gastroenterology, obesity medicine, and internal medicine. This lets me blend the best of traditional care with cutting-edge therapies like peptides, PRP, exosomes, and personalized plans. At The Real Gut Doctor, my focus is you: We create custom diets, supplements, and lifestyle tweaks to restore your vitality, mental sharpness, and joy. Whether it's beating IBS, colitis, or low energy, I've guided countless patients to ditch meds, heal after surgery, and live fuller lives. No extreme diets or guesswork—just real results. If you're tired of feeling off and ready for change, let's chat. Visit therealgutdoctor.com or book a discovery call—I'm here to empower you every step of the way!

Dr. Nicholas Klaiber is a double board-certified physician in Allergy & Immunology and Pediatrics, and the founder of Virginia Allergy Treatment Center PLLC in Richmond, VA. With more than a decade of clinical experience, Dr. Klaiber specializes in the diagnosis and management of food allergies, asthma, eczema, environmental allergies, and complex immune conditions. A regional leader in Oral Immunotherapy (OIT), Dr. Klaiber has helped hundreds of children and adults safely reduce their risk of severe reactions and reclaim their quality of life. His patient-centered approach emphasizes evidence-based care, advanced diagnostic testing, and individualized treatment plans. Dr. Klaiber has published widely in peer-reviewed medical journals throughout his career and remains active in clinical research and medical education. He has been recognized by patients and families for his compassionate, accessible care—including being named Individual Allergist Winner by Fredericksburg Parent Magazine in 2025. At Virginia Allergy Treatment Center, Dr. Klaiber is committed to expanding access to innovative, lifesaving therapies such as OIT, biologics, and infusion-based immune treatments. He regularly provides expert commentary for journalists on topics related to food allergies, anaphylaxis, asthma management, immune disorders, and emerging therapies.

Amanda Callenberg is a London-based BANT Registered Nutritional Therapist specialising in chronic digestive issues, IBS, and stress-related gut symptoms. She works with clients who feel stuck with bloating, unpredictable digestion, fatigue, and food sensitivities despite trying multiple diets or supplements. Her approach combines functional medicine and nutritional therapy with nervous system regulation and Compassionate Inquiry. Amanda believes that while nutrition forms the foundation of health, unresolved stress patterns often influence long-term gut dysfunction. Her work supports clients in addressing both the physiological and emotional contributors to digestive health. She has particular expertise in IBS, dysbiosis, SIBO, gut-brain connection, hormone-related digestive issues, and stress-driven symptom flares. Amanda regularly supports clients with complex or long-standing cases, creating personalied protocols rooted in nervous system support to support clinical testing and personalised nutrition. Amanda is registered with BANT and CNHC and provides evidence-informed commentary on gut health, nervous system regulation, women’s health, and functional nutrition She is available for expert commentary, quotes, and interviews on digestive health, IBS, stress-related illness, women’s hormone health, and root-cause approaches to chronic symptoms.

Number one international bestselling author, award-winning nutritional therapist and aesthetician specialising in women’s health, Alison Bladh has over 35 years of experience in the health and wellness industry. She is dedicated to helping women 40+ improve energy, balance hormones, enhance skin health and regain confidence through evidence-based nutrition, lifestyle strategies and inside-out beauty. Combining her functional medicine approach with her CIDESCO training in aesthetics, she offers a unique blend of expertise that addresses both internal health and external appearance. Alison’s work has been featured in national and international media including OK! Magazine, Woman & Home, Daily Mirror and Hälsa.

A company is only as strong as its people. Yet, I see it every day—burnout, stress, and chronic fatigue are draining the energy of employees, impacting performance, engagement, loyalty, and innovation. I’ve spent my career uncovering the root causes of these issues and helping people reclaim their energy, focus, and long-term health. As a physician, bestselling author, and host of the nationally syndicated TV show Ask Dr. Nandi, I’ve helped millions take control of their well-being. My latest book, Heal Your Gut, Save Your Brain, a New York Times bestseller, unpacks the critical link between gut health and cognitive wellbeing—a connection that has the power to transform not just individuals, but entire organizations. This is a core promise of The Vitality Advantage—the idea that when employees function at their best, companies thrive. I don’t just share science-backed strategies for better health—I help teams implement real changes that boost resilience, performance, and energy in a way that directly impacts business success. My message is simple: * Vitality is a Vital business advantage. * Healthy employees are more engaged, creative, and productive. * Burnout prevention starts with physical and mental well-being. * Corporate transformation happens from the ground up—one healthier, more energized employee at a time. If your company is ready to embrace The Vitality Advantage, let’s connect and discuss how I can bring this actionable, high-impact message to your organization.

Dr. Basaria is a transformational expert who takes an integrative approach to health and wellness, with a comprehensive focus on a person’s physical, mental, emotional and spiritual needs. Her approach includes using physical activity and food as medicine, working on developing healthy relationships and finding career satisfaction for mental and emotional balance, and using mindfulness, meditation, breathing techniques and yoga- to name a few- as ways to manage stress. To learn more about Dr. Basaria or True Living, visit www.truelivingforlife.com

Certified nutritionist, Rosa Contreras counsels patients at Oasis Of Hope Hospital through individual sessions and provides them with a healthy, lifelong nutrition plan. In addition, Rosa will provides patients with specific guidelines on how to begin a new heathy lifestyle.

Dr. Shiv Goel, MD is a board-certified physician and the founder of Prime Vitality Care, a physician-led functional medicine and wellness clinic based in San Antonio, Texas, with telehealth services available to patients in all 50 states. Dr. Goel trained in internal medicine and functional and integrative medicine, and has spent his career building a practice model that treats the root causes of poor health rather than managing symptoms in isolation. His clinical philosophy is grounded in the understanding that hormones, metabolism, inflammation, gut health, and mental well-being are deeply interconnected systems — and that lasting health improvements require addressing all of them together. Prime Vitality Care specializes in physician-supervised GLP-1 medical weight loss programs using semaglutide and tirzepatide, bioidentical hormone replacement therapy (BHRT) for women, testosterone replacement therapy (TRT) for men, peptide therapy including Sermorelin, BPC-157, and PT-141, and comprehensive functional medicine consultations for patients with chronic fatigue, gut dysfunction, autoimmune concerns, and metabolic disease. Dr. Goel is a sought-after expert on the clinical application of GLP-1 therapies, the role of hormonal imbalance in weight resistance, and the future of physician-led telehealth medicine. He speaks regularly to the gap between what conventional medicine offers patients with metabolic dysfunction and what a root-cause, functional approach can deliver when the right diagnostics and time are applied. Through Prime Vitality Care's HIPAA-compliant telehealth platform, Dr. Goel brings the same standard of clinical depth and personalization to patients nationwide that San Antonio patients have relied on in person — with lab coordination through local Quest Diagnostics or CPL sites and all prescriptions compounded and shipped directly to patients.

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.

Simona Stohrer is a certified Holistic Nutrition and Longevity Expert, founder of Body2Balance, specializing in women 40+. After overcoming Hashimoto’s disease through functional nutrition and lifestyle medicine, she turned her own healing journey into her mission. With a background in corporate leadership and advanced training in functional medicine and epigenetics (including Dr. Kara Fitzgerald’s Younger You program), she helps women balance hormones, slow biological aging, and regain vitality. Simona works between Munich and Tenerife, integrating science-based nutrition, lifestyle optimization, and Korean dermocosmetics. Featured speaker and consultant in women’s health, anti-aging, and metabolic wellness.

Dr. Eric Berg, D.C., is a leading health educator, best-selling author, and founder of the Berg Institute of Health & Wellness. With over 30 years of experience in chiropractic care and natural health, he has helped millions take control of their health through practical education, science-based nutrition, and his pioneering work in Healthy Keto® and intermittent fasting. Academic & Clinical Education Doctor of Chiropractic Palmer College of Chiropractic, Davenport, IA — 1985-1988 Undergraduate Pre-Medical Studies University of Wisconsin-Parkside — 1983-1985 Army Reserves – X-ray Technician Ft. Jackson, SC | Ft. Sam Houston, TX | Ft. Riley, KS | St. Phillips College, TX — 1983-1987 Licensure & Certifications Virginia Board of Medicine – Chiropractic License #1851 California Chiropractic License #20123 Louisiana Chiropractic License #875 Certificate of Proficiency in Chiropractic Radiography Certification in Neuro-Selective Current Perception Threshold Diagnostics (#30166) Teaching Experience Associate Professor – Community Health Division (Nutrition) Howard University, Washington, D.C. — Jan-June 2005 Professional Appointments & Affiliations Director, The Health & Wellness Center, Alexandria, VA — 1997-Present Private Practice, CA & LA — 1990-1997 Internships: Sound Chiropractic (WA) & Moll Chiropractic (CA) Member, Endocrine Society Advisory Panel, Health Science Institute Clinical Associate, Clinical Electromedical Research Academy (CERA) Honorary Member, Price-Pottenger Nutrition Foundation Member, International Academy of Chiropractic Occupational Health Consultants Member, American Association for Health Freedom Publications & Media Author: – The 7 Principles of Fat Burning – Healthy Hormones, Healthy Life – Dr. Berg’s Body Shape Diets Publisher: HealthySelf Newsletter Digital Education: – Over 5700 health and nutrition videos – YouTube channel with 31,000,000+ subscribers (multi-languages) Research Participation RAND Corporation – Participant, Chiropractic Outcomes Research, 1993 Seminar Leadership & Government Outreach Conducted over 4,950 health seminars and educational workshops for patients, healthcare practitioners, and government agencies including: FCC, FBI, NIH, NSF, DOJ, DOT, DOE, Department of Interior, and Library of Congress Conference Speaking Engagements Health Science Institute Wellness Symposium Sanibel Harbor Resort & Spa, FL — Sept 2000 Continuing Education & Specialized Training Extensive postgraduate coursework in BEST Technique, CRA, NAET, Clinical Nutrition, Fibromyalgia, Scoliosis, and others. Media Features & Interviews Featured in: FOX & Friends, CBS Channel 9, Woman’s World, New Beauty, Men’s Exercise, and multiple national radio outlets. Recognitions & Awards Proclamations from the Mayor of Shreveport, Governor of Louisiana, and national awards for public health education. Published Research Inhibition of SCOT and Ketolysis Decreases Tumor Growth and Inflammation in the Lewis Cancer Model Abolhassani, R.; Berg, E.; Tenenbaum, G.; Israël, M. | JJ Oncology and Clinical Research, 2022 Demonstrated in a mouse Lewis cancer model that inhibiting the ketolytic enzyme SCOT using acetohydroxamic acid (AHA) slows tumor growth and reduces NF-?B-mediated inflammation. Cancer Metabolism: Fasting Reset, the Keto-Paradox and Drugs for Undoing Israël, M.; Berg, E.; Tenenbaum, G. | Journal of Clinical Medicine, 2023, 12(4), 1589 Comprehensive review exploring ketone metabolism in cancer–focusing on SCOT and ACAT1–and proposing metabolic strategies such as fasting and enzyme inhibition. Link: https://www.mdpi.com/2077-0383/12/4/1589 Unraveling the Cancer Metabolism: Fasting Reset, Ketogenic Diet, and Therapeutic Strategies Berg, E.; Tenenbaum, G.; Israël, M. | Journal of Cancer Research Reviews & Reports, 2023, 5(2) Explores SCOT/ACAT1 dependency, ketone metabolism, and novel inhibitors like karrikins and vitamin C. Branched Chain Amino Acid Ketones, or Ketolysis of Beta-Hydroxybutyrate Support Lipogenesis and Tumour Growth Israël, M.; Berg, E.; Tenenbaum, G. | British Journal of Healthcare and Medical Research, 2024, 11(4), 69-75 Highlights tumor reliance on BHB and BCAA for lipogenesis via ketolysis. Two Antisense Non-Coding RNAs Regulate Their Sense Gene mRNAs: OXCT1-SCOT for Ketolysis and FGF-14 as an Anti-Proliferation Factor in Cancer Berg, E.; Tenenbaum, G.; Israël, M. | British Journal of Healthcare and Medical Research, 2025, 12(3) Identifies novel antisense RNAs regulating metabolic enzymes relevant to cancer growth. Frataxin–An Anti-Tumor Protein That Activates Oxidative Metabolism at the Expense of Ketolysis: Regulation of SCOT-OXCT1 Berg, E.; Tenenbaum, G.; Israël, M. | British Journal of Healthcare and Medical Research, 2024, 11(1) Discusses frataxin’s role in promoting oxidative metabolism and suppressing ketolysis in tumors.

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.