Peptide Library is an independent peptide research platform positioned as "peptide research finally organized." It integrates search, comparison, calculation, and tracking into a single workflow, replacing the previous practice of spreading these across multiple tools and spreadsheets. The platform explicitly states that it does not sell peptide products, and that the content is for research and educational purposes only, does not constitute medical advice, and is not for human use.
Main capabilities
- Searchable database: contains 209 peptide profiles, searchable by name, alias, molecular data, or references in a single search box, and the full database can be browsed by category. Each profile includes research information, identifiers, references, regulatory context, and supplier comparisons.
- Supplier comparison engine: displays supplier offers, price per milligram, ratings, and availability side by side, sorted by price per milligram from low to high. The page states that this ordering is not paid advertising ranking, that coupons or affiliate links do not change the ordering, and provides an explanation of the ranking mechanism.
- Reconstitution and concentration calculator: enter vial amount, diluent volume, and target dose in a single flow to obtain the volume to draw, without leaving the current page. Opening the calculator from each peptide profile pre-fills the common vial specifications for that compound. The page also provides example calculations and emphasizes that these are merely arithmetic examples, not dosing advice.
- Research tracker: puts schedules, logs, reminders, metrics, notes, and inventory on the same timeline, making it easier to keep a research protocol consistent over months. Tracking and inventory are behind a free account, and Pro supports cross-device synchronization.
- Other features: peptide calculators (concentration, units, and injection volume), step-by-step courses with saved progress, inventory management (remaining amount, stock levels, and restocking references), Pro cloud sync and backup, and more.
Data sources and methodology The platform states that each profile is compiled from published literature and public registry data, with sources cited and a last-reviewed date noted. Specifically, there are three types: first, published research; profiles are based on peer-reviewed literature, with citations recorded to PubMed identifiers and DOIs rather than secondhand summaries; second, regulatory and registry data; chemical identity and regulatory context come from public chemical registries and regulatory agency records, such as PubChem, ChEMBL, CAS, and UNII; third, verified references; citations are audited, profiles carry a review date, and corrections are version-recorded. The platform also provides full methodology, editorial policy, and ranking mechanism explanation pages.
How to use It is free to use on the web, with no account required. The reconstitution calculator is free, runs in the browser, and requires no account. Browsing the database, comparing supplier offers and price per milligram, viewing supplier ratings and review counts, the single-peptide calculator, inventory for 1 peptide (each entry up toTwo more containers) are all within the free scope. Tracking and inventory data are kept private under the free account and are not publicly shared. The Pro version is available in the iOS and Android apps, priced at US$39.99 per year or US$89.99 for lifetime, unlocking unlimited inventory, cloud sync and backup, a hybrid calculator, courses and community Q&A, data export and advanced tracking, progress photos, and a research dashboard; subscriptions are purchased and managed in the mobile app. The mobile app has accumulated more than 20,000 downloads on the App Store and Google Play.
Applicable scenarios Suitable for people who need to centrally consult peptide research materials, compare different suppliers' prices per milligram, perform reconstitution concentration conversions, and keep long-term records of research protocols. The platform provides term explanations (such as "pinning" and "reconstitution") and FAQs, mainly for research literacy and terminology records, and reiterates that it does not include injection technique guidance and does not constitute medical advice.
Limitations and precautions The platform does not sell peptide products; all content is for research and educational purposes only, is not for human use, and does not constitute medical advice. Account features such as tracking and inventory require registration, and cross-device sync requires Pro. Subscriptions are purchased only in the mobile app. The platform does not provide more details about other features, fees, or effects.
