How to track a peptide cycle without losing your history

Why a cycle is harder to log than a daily habit

A daily vitamin is easy. Same thing, every day, forever. A cycle is not, because the schedule itself has a shape, and that shape is the part people lose track of. Most protocols I have seen fall into one of these:

• An on and off pattern. Five days on, two days off. Weekdays only. Every other day. The pattern repeats inside the week, and the question you keep asking is "is today an on day?"
• A date window. A start date and an end date, then a break before the next one. The question here is "what week am I in, and when does this stop?"
• A single run. Something like a 20 day Epitalon run that stops on its own and does not come back until you start it again. The question is "what day of 20 is this?"
• A fixed interval. Once a week on the same day, or every 3.5 days. The question is "when was the last one?"

Plenty of people run two or three of these at once. A weekly shot, a daily stack on a five and two pattern, and a short run on top. That is where a notes app or a calendar starts falling apart, because each one needs a different kind of reminder and none of them line up.

What to write down every time

The minimum that still makes sense to you later:

• Date and time. Time matters more than people think once you are on a fixed interval.
• Compound. Use the same name every time. "BPC" and "BPC-157" become two things in a spreadsheet.
• Amount and unit, exactly as you measured it. If you drew 10 units on a syringe, write 10 units. If you think in mcg, write that too.
• Which vial it came from. Syringe units only mean something next to the concentration of the vial. When you mix a new vial with a different amount of water, the same 10 units is a different amount. Write the mix date and concentration once per vial and tie each entry to it.
• Injection site, if you rotate.
• A short note when something is worth remembering. Keep it to what happened, not what you think it means.

If the vial math is the part you are unsure about, the free reconstitution calculator shows the arithmetic step by step so you can check it against your own numbers.

Keep the plan and the log separate

This is the single biggest thing I got wrong when I tracked in a spreadsheet. I had one sheet that was both the schedule and the record. Each row was a planned day, and I would mark it done. It worked until I changed something.

The fix is to keep two lists:

1. The plan. What you intend to do, with a start date. Compound, amount, pattern, end date if there is one.
2. The log. What actually happened, one line per entry, written when it happened.

The plan tells you what today should be. The log tells you what today was. They are allowed to disagree, and when they do, that is information, not an error to tidy up.

Changing the protocol mid-cycle without losing the past

Protocols change. You adjust an amount, move from daily to five and two, or stretch a window by a week. The mistake is editing the plan in place, because every past entry quietly starts pointing at the new numbers, and six weeks later you cannot tell what you were doing in week two.

What works:

• Never edit a past log entry to match a new plan. The log is history. Leave it alone.
• End the old plan and start a new one with today's date, instead of overwriting it. Now there is a clear line: before this date it was A, after it, B.
• Write one note on the change day saying what changed and why, in a sentence.

Log the misses and the breaks too

A missed day is worth a line. Write "missed" rather than leaving a gap, and do not backfill it as if it happened. A gap could mean you missed it or you forgot to log it, and later you will not know which.

Same with breaks between cycles. Write the date the break started and the date it ended. When you look back at a year, the off weeks are part of the picture, and they are the first thing that disappears from a log that only records the days something happened.

Keep an eye on supply

Running out halfway through a window is the most common way a cycle gets messy. For each vial, note the mix date and roughly how many draws it holds at the amount you are logging. Count down as you go. When you are a few draws from empty, that is your cue to sort out the next one, not the morning you reach for it.

Looking back at a finished cycle

When a cycle ends, it takes ten minutes to review it while it is fresh. These are the questions I ask my own log:

• Planned versus logged. How many entries did the plan call for, and how many happened?
• What changed, and when. Every plan change should have a date and a note.
• The notes, read in order. Patterns are easier to see in a row than one day at a time.
• Where the bloodwork fell. If you had labs drawn, write down which day of which cycle the draw happened on. A result means more next to your own dates. What it means for you is a question for whoever ordered the test.

A simple template if you want to do this by hand

You do not need an app for any of this. Two tabs in a spreadsheet will do it.

Rule for the Log tab: add rows, never edit old ones. If a row is wrong, add a correcting row with a note.

Where Pinwise fits

I built Pinwise because that spreadsheet got away from me. It does the bookkeeping above on its own: cycles that run themselves (on and off patterns, date windows, a single 20 day run), reminders that follow the schedule, dose history that survives protocol changes, and inventory with low stock alerts. All of the tracking is free, there is no account, and the log lives on your iPhone. It is iPhone only for now. If you are comparing options, I wrote up an honest comparison that includes the apps I compete with.