The efficacy of testosterone in the body does not depend solely on its blood concentration, but is modulated by the biology of androgen receptors.

noli's read

This point highlights a fundamental biological reality: hormonal response is mediated by the sensitivity of cellular receptors (ligand-receptor interaction). Research in endocrinology confirms that the number and sensitivity of these androgen receptors, influenced by genetic factors such as CAG repeats in the receptor gene, determine the final effect of testosterone (observational studies and reviews in molecular endocrinology). It is scientifically accurate to state that two individuals with identical testosterone levels can present different clinical outcomes due to this receptor variability. The explanation does not seek to oversimplify, but rather to integrate the biological complexity of the endocrine system. There is no exaggeration here, as the statement aligns with the consensus regarding hormonal signaling. This is an essential nuance for understanding why hormone therapies do not produce uniform effects in all individuals.

the sources

No named source held this one up — that absence is part of the verdict.