Blood-Work Monitoring: The Most Important Markers

Regular blood work is probably the most underrated part of any protocol. While a lot of attention goes to substance selection and dosing, checking your own lab values is often done only as an afterthought — or not at all. Yet it is the actual core of harm reduction: you cannot manage what you do not measure.

The base markers

Hematocrit & hemoglobin – With testosterone and other AAS use, red-blood-cell production often rises, which makes the blood thicker and increases cardiovascular risk. A hematocrit value well above the norm is a clear warning sign.

Liver values (ALT, AST, GGT) – Especially relevant with orally taken substances of 17-alpha-alkylated structure, but also useful as a general health check.

Lipid profile (LDL, HDL, triglycerides) – Many anabolic substances shift the lipid profile unfavorably, with potentially long-term cardiovascular consequences that are not immediately noticeable.

Kidney function (creatinine, eGFR) – Particularly relevant when several substances are combined or when pre-existing conditions exist.

Hormonal markers

Testosterone (total and free), estradiol (measured sensitively), LH and FSH give insight into the state of the HPTA axis — important both during a protocol and for assessing recovery afterward.

How often to check?

As a rough framework, the following has proven useful:

• Before starting: A complete baseline blood panel as a reference
• 6–8 weeks after starting: A check to catch outliers early
• Every 3 months: As a routine interval for longer-term protocols
• After stopping: A check on recovery, especially of the hormonal axis

These intervals are a general orientation and do not replace individual medical advice, which can differ depending on the substances used, dosing and personal health situation.

The most important point

A value outside the norm is no reason to panic, but also not one to ignore. Interpretation belongs in medical hands — this overview helps you go into that conversation more informed and know what to ask about in the first place.

In the individual substance entries you will find a dedicated "Blood work & monitoring" section with the specifically relevant markers.