Bloodwork Before, During and After a Cycle

Why baseline matters more than any single result

A blood panel taken mid-cycle tells you almost nothing without a baseline to compare it to. Reference ranges are population ranges, and the interesting question is almost never "is this inside the range" but "how far did this move from where it started".

Take the baseline before anything begins. It is the only result you can never reconstruct afterwards.

The markers worth paying for

Liver: ALT and AST, plus GGT if orals are involved. Lipids: full panel, not just total cholesterol — HDL and LDL move in opposite directions and the ratio is the useful figure. Haematocrit and haemoglobin, because elevated haematocrit is one of the more common and more consequential changes. Kidney: creatinine and eGFR. Hormonal: total and free testosterone, LH, FSH, and oestradiol.

A panel that reports only total testosterone has covered approximately one of these.

When to test

Baseline before starting. Mid-point once the protocol has stabilised — early enough to catch a problem, late enough that the results reflect steady state rather than the first week. And a recovery panel several weeks after the end, which is the one people skip and the one that tells you whether anything normalised.

Reading a result against a certificate

An unexpected blood result has three possible sources: the compound did something, the dose was not what you thought, or the material was not what it claimed. The certificate rules out the third only if you actually read it — and it can only rule out the third if the certificate is batch-linked to the vial you used.

This is the practical reason batch verification is worth the ten seconds: when something goes wrong, it is the difference between a known input and an unknown one.