Defy Medical vs Function Health

Vial Take

Both providers share a metabolic health focus, but they're built for fundamentally different jobs: Defy is a full-service treatment platform where you'll leave with prescriptions filled through named compounding pharmacies, while Function is a diagnostic-first service where you'll get deep lab insight but no dispensing infrastructure and pharmacy transparency isn't part of the model. Defy's 12-year operating history and named physician give you more to audit before you commit, while Function's edge is the sheer breadth of its metabolic and longevity panels, which go well beyond what most treatment platforms order as baseline work.

Biggest Differences

1. 1
   Pharmacy disclosure
   Defy Medical publishes its compounding partners (Empower Pharmacy, Olympia Pharmacy), so you can verify the supply chain; Function Health does not name a pharmacy partner publicly.
2. 2
   Physician disclosure
   Defy Medical publishes named clinical leadership you can research before signing up; Function Health describes its clinical team in aggregate without identifying specific physicians.
3. 3
   Operating history
   Defy Medical has been operating since 2012 (14+ years of visible track record); Function Health launched in 2021, giving you 9 fewer years of public record to evaluate.