Understanding Muscle Aging
Why Your Muscles Stop Growing After 60
Your muscles are living tissues that constantly break down and rebuild. This process is driven by growth hormone (GH) and insulin-like growth factor-1 (IGF-1) - hormones that peak in your 20s and gradually decline thereafter.
By age 60, your GH secretion has dropped by roughly 50%. By 80, it's down 70-80%. Without adequate GH and IGF-1, your muscles shift from a building mode to a net loss mode. Your body breaks down muscle faster than it rebuilds it, a process called protein catabolism.
The result? You lose approximately 3-5% of muscle mass per decade after age 30, accelerating after 60. This isn't cosmetic - it directly impacts your ability to live independently.
"Muscle loss isn't inevitable aging - it's a consequence of declining hormones that can be addressed."
Growth hormone peptides don't replace natural aging, but they restore your body's ability to build and maintain muscle tissue. Myostatin inhibitors go further - they remove the brakes that prevent muscle growth. Together, they address the root cause of sarcopenia.