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Testicular atrophy and fertility suppression are real, documented consequences of TRT, and understanding them is the first step toward making an informed deci

The biological evidence is robust at the cellular level, and clinical results are promising but limited by small study sizes, industry sponsorship, and absence of independent replication

Most studies consist of small human pilot studies conducted in the 1980s and a large body of animal preclinical data arising after the fact

This might be due to the intervention period and dosage of L-carnitine