Growth hormone (GH) and its downstream mediator, insulin-like growth factor 1 (IGF-1), are arguably the most powerful anti-aging hormones in the human body. They govern muscle protein synthesis, fat metabolism, tissue repair, bone density, immune function, and cognitive performance. They peak in adolescence and early adulthood and decline at roughly 14–15% per decade thereafter — a process called somatopause.
By age 60, most adults have growth hormone secretion that is 75% lower than it was at age 25. The consequences are visible and measurable: reduced lean muscle mass, increased abdominal fat, impaired exercise tolerance, thinner skin, slower wound healing, reduced bone density, diminished sleep quality (particularly slow-wave sleep, during which GH is predominantly released), and a general sense of diminished vitality that is often attributed simply to “getting older.”
IGF-1 is the primary blood marker for growth hormone status. Optimal IGF-1 levels for adults in their 40s, 50s, and 60s are significantly higher than what is considered “normal” by conventional lab standards — typically in the 200–350 ng/mL range, compared to the reference range floor of 60–80 ng/mL. Many adults walking around with IGF-1 values in the 80–120 ng/mL range are functionally growth hormone deficient and have no idea.
Restoring growth hormone axis function can be approached through several strategies: optimizing sleep architecture, resistance training (the most potent natural stimulus for GH release), strategic fasting, reducing insulin (which suppresses GH), and — in appropriate clinical situations — peptide therapies that stimulate natural GH release rather than replacing it directly.
Growth hormone testing and optimization should be part of any comprehensive longevity and anti-aging protocol. Call 844-734-2112 or contact our team to get your IGF-1 evaluated.