Testosterone

Testosterone is the principal androgen, important in both sexes but present at much higher levels in men. Labs report total testosterone and, when needed, free (unbound) testosterone.

Testosterone influences libido, muscle and bone, mood, and energy. Diagnosing genuine deficiency (hypogonadism) matters — but so does avoiding over-treatment of normal age-related decline, where benefits are modest and risks real.

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   FoundationResistance TrainingWhy strength training is one of the highest-yield things you can do for lifelong health.
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   ConditionMale HypogonadismClinically low testosterone — confirmed, not assumed
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   Signal RecordCreatineCreatine Monohydrate
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   Body SystemHormonesEndocrine signaling that regulates the whole body.

1. Measure it
2. Understand your result
3. See what raises and lowers it
4. Apply evidence-based interventions
5. Recheck on your review cadence

An orientation to how this topic is typically approached — not medical advice.

Low testosterone with consistent symptoms may indicate hypogonadism warranting evaluation of the cause. A single low reading — or a low-normal value without symptoms — usually does not justify treatment.

• Morning, fasting blood draw
• Repeat to confirm; add free testosterone / SHBG as needed

Testosterone therapy has clear benefit for diagnosed hypogonadism; for age-related low-normal levels the benefits are modest and the long-term risk picture is still being defined.

• Endocrine Society Clinical Practice Guideline on Testosterone Therapy
• Testosterone Trials (TTrials)

Sources are named authoritative guidelines and scientific bodies. Biomarker pages present established clinical context; calibrated evidence verdicts on specific interventions live in the linked Signal Records.