Advanced Gut Testing
We’re offering in-home, advanced gut testing and advice so you can get to the bottom of your symptoms and take a holistic approach to feeling better
Basic Food Sensitivity Test
Test your immune response to 22 common foods to guide your dietary choices or inform an elimination diet
Advanced Food Sensitivity Test
Test your immune response to 132 common foods to guide your dietary choices or inform an elimination diet
Microbial Ecology Profile
Cutting-edge biomarker test of digestive function, intestinal inflammation, and intestinal microbiome health
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Our Providers think differently
When you select a consultation during checkout, our doctors will translate your results into actionable next steps that work with your lifestyle. Our staff focuses on getting to the root cause of health symptoms so that you are armed with not just the what, but the why.
Meet our Doctors
Robin BerzinDoctor & CEO • New York City
Dr. Robin Berzin, MD is the founder and CEO of Parsley Health. A Summa Cum Laude graduate of the University of Pennsylvania, Robin completed medical school at Columbia University’s College of Physicians and Surgeons, and trained in Internal Medicine at Mount Sinai Hospital in New York City. She has also trained in functional medicine with the Institute for Functional medicine, where she is an advisor on digital technology.
Thyroid, hormones, fertility, digestive health, the biology of stress, cancer prevention, and autoimmune disease
Zandra PalmaDoctor • New York City
Dr. Alexandra Palma, MD is a physician with a background in Functional Medicine, Internal Medicine, and Anesthesiology. Her interest in Functional Medicine began in college when she studied Human Evolutionary Biology at Harvard University.
Metabolic health, functional pain management, longevity, metabolic syndrome, hormonal health, health optimization for athletes, genetic and epigenetic medicine, weight management, thyroid, autoimmune, allergies
Julie TawDoctor • New York City
Dr. Julie Taw, MD is a board certified Internal Medicine physician. Julie graduated from Albert Einstein College of Medicine and completed her residency training at New York University. As a busy working mom she understands the challenges of incorporating a healthful lifestyle into our busy lives.
Cardiometabolic Health, Gut Health, Mental Health, Nutrition, Cancer Prevention, Sleep
Lilli LinkDoctor • New York City
Dr. Lilli Link, MD is a board-certified internist and functional medicine practitioner who graduated from medical school at the University of Chicago and completed her residency at Columbia Presbyterian Medical Center in New York.
Cancer prevention, cardiovascular disease, thyroid and adrenal health, autoimmune disorders, fatigue, digestive health, weight management, metabolic syndrome, diabetes, allergy desensitization, stress hormones, hormonal health & fertility, and nutrition.
Harika PalDoctor • New York City
Dr. Harika Pal MD is a board-certified Family Medicine physician. She graduated from the University of South Florida College of Medicine and completed her family medicine residency training at the Mount Sinai Beth Israel Medical Center. Prior to joining Parsley Health, she practiced full-spectrum family medicine in the South Bronx with the Montefiore medical system and served as the Medical Director for the School Based Health Center Program under the Institute for Family Health.
Preventative care, Women’s Health/Reproductive Health, and Cardiometabolic Health
Gabriella SafdiehDoctor • New York City
Dr. Gabriella Safdieh, MS, MD is a pediatrician and rheumatologist. Gabriella completed medical school at the University of Pennsylvania, trained in Pediatrics at New York University, and completed a fellowship in Pediatric Rheumatology at the Hospital for Special Surgery in New York City / Weill Cornell Medical center.
Pediatrics teenagers and young adults autoimmune disease systemic lupus erythematosus juvenile rheumatoid arthritis thyroid adrenal health
Stephanie WallmanDoctor • New York City
Dr. Stephanie Wallman, DO is a board-certified Family Medicine physician specializing in Functional Medicine. She graduated from Lake Erie College of Osteopathic Medicine and completed her residency training as Chief Resident at Jamaica Hospital Medical Center in Queens, NY. In college, she double majored in Biology and Psychology while minoring in Evolutionary Studies. She received her Functional Medicine training through the Institute of Functional Medicine.
Gastrointestinal Health, Obesity/Metabolic Syndrome, Thyroid and Adrenal Health, Preconception Planning, Diabetes, Hypertension, Autoimmune Disease, and Sleep Disorders
Rachael GonzalezDoctor • Los Angeles
Dr. Rachael Gonzalez, MD is board certified physician in both Family Medicine and Integrative Medicine. Rachael graduated with honors from Harvard College and completed her medical school education at the University of California, San Diego.
Thyroid management, menopause management, adrenal issues, digestive disorders, asthma, allergy, autoimmune conditions, migraines, metabolic syndrome, diabetes, preventative cardiology, and nutrigenomics.
Jaclyn TolentinoDoctor • Los Angeles
Dr. Jaclyn Tolentino, DO is a Board-Certified Family Physician with a collaborative, holistic approach to practicing medicine. She holds a subspecialty certification in Hormone Optimization, has received extensive training in Functional Medicine through the Institute of Functional Medicine, and additional training in oncology nutrition.
Hormone balancing and optimization, epigenetic & nutrigenomics, clinical cannabinoid medicine, cancer prevention and nutrition, men’s & women’s health
Tiffany LesterDoctor • San Francisco
Dr. Tiffany Lester, MD is a graduate of The University of Cincinnati College of Medicine, where she completed her training in Internal Medicine. She also graduated from Integrative Medicine Fellowship at The University of Arizona, and she has extensive training in functional medicine through The Institute of Functional Medicine.
Thyroid and adrenal health, cardiovascular disease, metabolic health, stress hormones, genetic and epigenetic medicine, hormonal health and fertility, and autoimmune disease.
Kerri MasuttoDoctor • San Francisco
Dr. Kerri Masutto, MD is an Internal Medicine primary care physician with an integrative, whole-person approach to medicine who graduated from The College of Medicine at University of Illinois. With training in primary care, plus ongoing education through the Institute for Functional Medicine she creates a unique healing experience for anyone looking to improve their health and their life.
Optimization, bio-hacking, prevention and reversal of cognitive decline, women’s health, mental health, integrative modalities