Prices sourced from each retailer's public site. Most products fulfill via Quest or LabCorp; specialty kits (Genova, Doctor's Data, ZRT, Cell Science Systems / ALCAT, SpectraCell, US BioTek, Everlywell, MitoSwab, Nebula, Viome, Tiny Health and others) ship from their own labs. Always verify before purchase. 100% self-hosted and non-profit.