functional-medicine
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Tiffany Mullen Left the 10-Minute Visit and Built a Company Around Time
The Vytal Health founder traded a large health system for the unruly work of building a company - and made the unscalable act of listening the center of its model.
Vytal Health Bet Patients Would Pay to Be Heard - Then Built a $300-a-Month Alternative to the 10-Minute Visit
The Milwaukee telehealth practice asks patients to pay outside insurance for time, continuity and deeper testing. Its early obstacle was convincing people that a video visit could still feel human; its sharper 2026 answer is a two-tier membership with unusually clear boundaries.
BodyBio
BodyBio is a family-owned, third-generation supplement company based in Millville, New Jersey that builds health at the cellular level. Founded in 1998 by biochemist Ed Kane, it grew out of a blood-chemistry diagnostics practice into a maker of phospholipid, electrolyte and short-chain fatty acid products - most notably BodyBio PC (phosphatidylcholine) and e-lyte electrolyte concentrate - manufactured in-house and sold to consumers and to a network of more than 35,000 healthcare practitioners.
The Lanby
The Lanby is a membership-based, hospitality-led primary care practice in New York City that reimagines concierge medicine for a modern, prevention-minded patient. Founded in 2021 by breast cancer survivor Chloe Harrouche, it pairs every member with a dedicated care team - a lead physician, wellness advisor, medical assistant, physician associate, and member advocate - to connect the dots across medicine, wellness, and care coordination. For a flat annual fee and no insurance friction, members get unlimited visits, advanced diagnostics with 85+ biomarkers, personalized care plans, and expedited specialist referrals.
Parsley Health
Parsley Health is a functional-medicine telehealth provider founded in 2016 by physician Dr. Robin Berzin. It pairs in-depth diagnostics and biomarker testing with longitudinal, team-based care - doctors plus health coaches - to find and treat the root causes of chronic conditions like gut, autoimmune, hormonal, metabolic and mental-health issues, rather than just managing symptoms. Originally a cash-pay membership model with clinics in New York and Los Angeles, Parsley has shifted to a virtual-first national service and in 2026 became the first functional-medicine provider to accept insurance in-network nationwide, putting its care within reach of roughly 150 million insured Americans.
Robin Berzin
Robin Berzin is the founder and CEO of Parsley Health, a holistic, root-cause medical practice she launched in 2016 to make functional medicine modern, data-driven, and reachable online nationwide. A Columbia-trained physician who started out chasing securities fraud as a paralegal at the U.S. Attorney's office, she co-founded the doctor-messaging app Cureatr in medical school before building Parsley into one of the largest functional medicine practices in the country. She is the author of State Change, a World Economic Forum Tech Pioneer, and one of Inc.'s 100 most innovative women in business.
Ellen Rudolph
Ellen Rudolph is the Co-Founder and CEO of WellTheory, a San Francisco-based digital health company on a mission to reverse the autoimmune epidemic. A Stanford-trained product design engineer and Functional Medicine Certified Health Coach, Ellen founded WellTheory in 2022 after her own years-long battle with debilitating autoimmune symptoms drove her to create the empathetic, evidence-based care she wished she'd had. WellTheory has since raised $33.4M in total funding—including a $14M Series A led by General Catalyst in October 2025—and achieved 10x year-over-year member growth and 5x revenue growth, serving 50 million Americans navigating autoimmune conditions.