Peptide Library

Peptide Library is an independent research hub for peptides. It brings together the reference material, the math and the price data that people researching peptides usually piece together from forums, vendor sites and spreadsheets. - Research library: profiles for 200+ peptides with key facts such as CAS number, molecular weight, half-life, FDA status and evidence level. - Reconstitution calculator: enter the vial size and the water you add to get the concentration, the volume to draw and the units on a U-100 syringe. It also handles blends and cost per dose. - Vendor price comparison: price per mg across vendors, with each vendor counted once at the median of its listings and the collection dates shown. - iOS and Android apps: dose logging, vial and inventory tracking, schedules and reminders. The web tools are free and need no account; Peptide Library Pro ($4.99/month) unlocks more in the apps. Built with Expo / React Native, Next.js and Supabase. Peptide Library does not sell peptides, and all content is for research and educational use only.