Age-Related Androgen Depletion is the gradual, physiological decline in the production and bioavailability of androgen hormones, primarily testosterone, that occurs naturally with advancing chronological age in both males and females. This reduction is often clinically linked to diminished gonadal function and altered feedback loops within the hypothalamic-pituitary-gonadal (HPG) axis. It is a recognized component of the aging process that can significantly impact muscle mass, bone density, mood, and overall vitality.
Origin
The concept combines the established biological phenomenon of “aging” with the endocrinological term “androgen depletion,” reflecting the measurable reduction in these vital steroid hormones over time. In males, this clinical syndrome is often referred to as late-onset hypogonadism or andropause, while in females, it contributes to post-menopausal hormonal shifts. The scientific origin lies in longitudinal clinical studies tracking the progressive alteration of hormonal profiles across the human lifespan.
Mechanism
The primary mechanism involves reduced sensitivity of the testes or ovaries to pituitary gonadotropins (LH and FSH), leading to decreased hormone synthesis at the gonadal level. Additionally, age-related increases in the concentration of Sex Hormone-Binding Globulin (SHBG) can significantly lower the concentration of biologically active free testosterone. This multifactorial decline compromises androgenic signaling in target tissues, contributing to symptoms like sarcopenia and reduced libido.
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