Why your first vial is the one worth over-documenting

Why your first vial is the one worth over-documenting

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By the third vial you will have a routine and the record will be terse, which is fine. The first one is different, because it is the only vial where you have no baseline to compare against, and because almost every mistake you will make over the following months is a mistake you can make in the first two weeks.

Over-documenting the first vial means writing down things that will later feel obvious. The exact volume of water you drew, including whether you overshot and by how much. How long the powder took to go into solution. Whether the solution was clear or had any visible particulate. The exact unit count you drew for each of the first several doses, including the ones where you were not sure you hit the mark. The time of day. The site.

This is worth doing for three reasons. First, it establishes what normal looks like for you, so that an abnormal vial later is recognisable rather than merely suspected. A vial that takes noticeably longer to dissolve, or that looks slightly different, is only noticeable if you wrote down what the first one looked like.

Second, it makes the early arithmetic auditable. If your unit counts turn out to have been wrong, you want to be able to reconstruct what you actually did rather than what you believe you did, and belief is unreliable in exactly the period when everything is new.

Third, the first vial is where you will discover whether your chosen dilution was a good one. Recording how hard each dose was to draw, in plain language, is what tells you whether to change the volume on the next vial. "Had to guess between marks" written three times is a much stronger signal than a vague memory of finding it fiddly.

You do not need to keep this up. After the first vial, drop back to date, dose, units, concentration, site. The detailed record has done its job by then.

One practical note: capture the label. A photograph of the vial label, taken before the water goes in, costs nothing and settles later questions about strength, lot and expiry that are otherwise unanswerable once the label gets damp. Keep it with the vial record, whether that is a folder or a peptide vial and dose tracker, so that the picture and the numbers do not live in two different places.

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