Published by Peptide Protocols · Reviewed September 2026 · How we make these pages · Educational & research purposes only — not medical advice.
Read any peptide discussion and you'll see "cycling," "on-cycle," "off-cycle," and "washout." It sounds more complicated than it is. Here's the plain-English vocabulary — and why keeping a clean record is the part that actually matters.
Cycling just refers to running a compound for a period ("on"), then pausing for a period ("off"), rather than continuously. People research cycles for different reasons depending on the compound and goal. The specifics — how long, how often — vary enormously and are exactly the kind of thing that belongs in a conversation with a qualified professional, not a blog. This page is about the vocabulary and record-keeping, not a protocol.
Here's the genuinely useful part. Whatever someone is researching, the value comes from knowing what they actually did — which compound, what concentration, which dates, and what they observed. Without a record, you can't tell what (if anything) is doing what. A vague memory is worthless; a clean log is data.
This is exactly what our Universal Excel Logbook is for — it stores each vial's concentration and dates, tracks where you are, and auto-calculates the reconstitution math for 38+ peptides. It ships with every guide in the shop, so your record and your reference live in one place.
See the guides + logbook on Etsy →We do not recommend or partner with any peptide supplier. Use the checklist instead: third-party COAs that match your batch and lot, stated purity, clear research-use labeling, real support and proper cold-chain shipping.
The supplier checklist →Educational content only. Confirm the legal status where you live before ordering anything.
It varies hugely by compound and goal, and it's not something to pin down from an article — that's a question for a qualified professional. This guide covers the vocabulary and record-keeping, not a protocol.
Reasons differ by compound. The universal point is that whatever you research, a clean record is what makes it meaningful instead of guesswork.
A dedicated logbook that also does the reconstitution math, so your dates, concentrations and calculations all live in one place.
Every PeptideProtocols guide ships with the Universal Excel Logbook — cycle dates, concentrations & tick marks for 38+ peptides, all in one place.
Browse the full library on Etsy →The one formula, a BAC-water chart, and the 10 most-researched beginner peptides — the math done for you. Print it for the fridge.
🎁 Send me the free cheat sheet →