# Pep Friends > Amino acid research documentation and estimation tools. ## Pages - [My Account](https://pepfriends.com/my-account-2/) - [Checkout](https://pepfriends.com/checkout-2/) - [Cart](https://pepfriends.com/cart-2/) - [Contact](https://pepfriends.com/contact/) - [Subscription](https://pepfriends.com/subscription/) - [Community](https://pepfriends.com/community/) - [Calculator](https://pepfriends.com/calculator/) - [Library](https://pepfriends.com/library/) - [Home](https://pepfriends.com/) - [My account](https://pepfriends.com/my-account/) - [Checkout](https://pepfriends.com/checkout/) - [Cart](https://pepfriends.com/cart/) - [Shop](https://pepfriends.com/shop/) ## Products - [Study Stage Planner](https://pepfriends.com/product/study-stage-planner/): A 20-page fillable PDF helps readers define a research question, record their learning goals, and plan which sources to consult next. Its stage-based prompts organize study work without estimating doses or offering experimental protocols. - [Pep Friends Library](https://pepfriends.com/product/pep-friends-library/): A monthly digital membership unlocks in-depth, citation-led amino acid research explainers, an expanding reference archive, and moderated anonymized community accounts clearly labeled as personal experience rather than evidence. Content is for personal informational purposes only and is not medical advice. - [Source Map Templates](https://pepfriends.com/product/source-map-templates/): This downloadable pack includes 12 fillable templates for mapping claims to papers, tracking citations, and comparing sources by study design and stated limitations. Use it to make a literature search easier to audit and revisit. - [Research Notes Journal](https://pepfriends.com/product/research-notes-journal/): A lay-flat, 120-page journal printed on uncoated paper offers dated pages for study notes, source citations, and questions to revisit. Its neutral format supports personal recordkeeping without prescribing what to measure or do. - [Paper Reading Workbook](https://pepfriends.com/product/paper-reading-workbook/): A 36-page downloadable workbook provides structured prompts for noting a paper’s question, methods, limitations, and cited sources. It helps readers organize their own literature review without turning findings into personal medical guidance. - [Research Terms Index](https://pepfriends.com/product/research-terms-index/): A 30-page searchable PDF explains common amino acid research terms, abbreviations, and distinctions in plain language. Find definitions quickly while reading papers, abstracts, and reference materials. - [Structure Atlas Cards](https://pepfriends.com/product/structure-atlas-cards/): This printable set of 24 study cards pairs selected amino acid structures with names and concise notation notes. Use the cards to review visual patterns and terminology without treatment or dosing instructions. - [Amino Acid Fieldbook](https://pepfriends.com/product/amino-acid-fieldbook/): A 48-page downloadable primer introduces amino acid names, classifications, and structural vocabulary with labeled diagrams and a concise glossary. Keep the core concepts together in a readable reference for independent study. [comment]: # (Generated by Hostinger Tools Plugin)