Peptide Half-Life

Peptide Half-Life is a free, public web tool for exploring how the reported half-life of a peptide shapes an idealized elimination curve. A half-life is the time it takes for a compound's plasma concentration to fall by half. The explorer lets you pick a compound and see an interactive chart of the percentage remaining over time, so the concept is easy to visualize and compare.
The site covers reported half-life values for fifteen compounds. Every value is tied to its source, the study population, the route of administration, and the formulation used, and these details are shown in dedicated panels beside the chart. You can switch between published values, custom values you enter yourself, and rough estimates, and the chart updates immediately. A comparison view covers GLP-1 class compounds so readers can see how published values differ across sources.
A methodology page explains how the curves are drawn. The charts use idealized first-order elimination, which is a mathematical illustration of exponential decay and not a prediction for any individual person. Real-world results vary with many factors, and the site says so plainly wherever the numbers appear.
Peptide Half-Life is intended for research and education only. It is not medical advice, and it is not a dosing tool. It never recommends, calculates, or assesses an amount to take, and it makes no statements about safety or effectiveness. Its purpose is to help students, writers, and researchers understand published pharmacokinetic figures and the context behind them, including where each number came from and how uncertain it may be.
The tool is free to use, requires no account or sign-up, and runs in the browser on desktop and mobile screens. Nothing needs to be installed. The site is powered by Peptide Library and is built and maintained by the team behind Peptide Library, but it is its own focused site dedicated to half-life exploration.
Typical uses include teaching how exponential decay works, comparing the published half-lives of different compounds, checking which study population and route a quoted figure belongs to, and building simple educational illustrations for articles or coursework. Because every figure is cited and the methodology is published on the site, readers can follow the references and judge the quality of the underlying evidence for themselves before using any value in their own notes, slides, or research summaries.