Understand the source comparison
Hormone Levels at 50 vs 30
By age 50, growth hormone secretion is roughly 25-30% of peak levels. Total testosterone sits 30-50% below the 25-year-old baseline. Free testosterone drops even further because SHBG continues to climb. The combination produces measurable effects: reduced lean
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- By age 50, growth hormone secretion is roughly 25-30% of peak levels. Total testosterone sits 30-50% below the 25-year-old baseline. Free testosterone drops even further because SHBG continues to climb. The combination produces measurable effects: reduced lean mass, increased body fat, lower bone mineral density, and diminished cognitive sharpness (Harman et al., J Clin Endocrinol Metab, 2001).
- These are not optional features of aging. They are biological realities that peptide therapy can partially offset.