Myths vs facts: Testosteron and fatigue

Testosterone and fatigue: myths vs facts. A common myth is that fatigue is always due to low testosterone. In reality, fatigue has many causes: sleep disorders, stress, nutritional deficiencies (e.g., iron, vitamin D), thyroid issues, depression, or chronic illness. Another myth is that testosterone replacement therapy (TRT) is a quick fix for fatigue. Evidence shows TRT only benefits men with clinically low testosterone and symptoms; for others, it may cause harm (e.g., cardiovascular risks). Fact: Low testosterone can contribute to fatigue, but the effect is often modest and context-dependent. A morning blood test is needed for diagnosis. Consumer DNA tests may indicate genetic variants affecting testosterone metabolism, but they are not diagnostic. Evidence: human-moderate. Caveat: Always consult a clinician before any hormone therapy.