About

Who runs this site

This site is run by Dennis Drenner, a former biologist and biohacker based in Medellín, Colombia. I spent years in life sciences before shifting toward independent research and self-experimentation, and over that time I watched the same arithmetic mistakes show up again and again in peptide reconstitution discussions. This site is my attempt to make those mistakes harder to make.

Why this site exists

Peptide reconstitution math is dimensional analysis. It is not difficult — but it is very easy to get wrong, especially when the inputs are in different units (mg vs mcg) and the output depends on which syringe scale you are drawing into (U-100 vs U-40). A wrong answer, in this context, is potentially a serious problem.

The existing tools for this math are scattered across forum posts, spreadsheets, and calculators with opaque code. I wanted a tool that was transparent, unit-tested, mobile-friendly, and entirely free — no sign-ups, no tracking of your inputs, no upsells, no vendor recommendations. This site is that tool, along with a small library of educational guides on the mechanics of reconstitution, syringes, and bacteriostatic water.

What this site is not

This site is not a medical resource. It does not recommend doses. It does not sell peptides. It is not affiliated with any peptide vendor. It is a unit-conversion tool for users who have already decided on a target dose in consultation with a licensed healthcare provider.

Research peptides sold in the United States are not approved by the FDA for human consumption and are labeled for laboratory research only. Information on this site describes publicly documented pharmacology and research history; it does not constitute advice to use any compound, and nothing here should be read as an endorsement of self-administration of research chemicals.

Editorial standards

• All calculator math is a single pure function covered by unit tests. Every page that displays a computed result — including the worked reconstitution examples on each peptide page — imports the same function. There is no hand-written math in content. The source is open on GitHub if you want to verify it.
• Factual claims about peptides (class, receptor targets, half-life, common vial sizes) are drawn from published research and manufacturer documentation. Claims that cannot be sourced confidently are omitted rather than invented.
• Content uses neutral framing — "has been studied for," "reported in the literature" — and never makes efficacy claims or dose recommendations.
• Corrections are welcome. If you are a researcher or clinician and spot a factual error, please email [email protected] (or open an issue on GitHub ) and I will update.

Contact

For corrections, feedback, or partnership inquiries, email [email protected]. For technical issues with the calculator or reports of bugs, the fastest route is to open an issue on GitHub .