Khorram Sermorelin RCT: Key Findings Explained in Plain Language
5 months of sermorelin produced measurable improvements in body composition, including a 5% decrease in body fat measured by DEXA scan.
Study overview
Conducted by
Dr. O. Khorram et al., UCLA
Patients
Healthy older adults aged 55-71
Duration
5 months (randomized, double-blind, placebo-controlled)
Published in
Clinical Endocrinology
Year
2001
Key findings
5% decrease in body fat percentage (DEXA-verified)
Using dual-energy X-ray absorptiometry -- the gold standard for body composition measurement -- the sermorelin group showed a statistically significant decrease in body fat compared to placebo.
Lean body mass preserved
While fat decreased, lean tissue mass was maintained. This is critical because most weight loss interventions sacrifice muscle along with fat.
IGF-1 levels increased significantly
Consistent with Corpas' earlier findings, IGF-1 rose to levels associated with younger adults, confirming sermorelin's ability to restore the GH/IGF-1 axis.
Improved skin thickness and collagen density
Skin metrics improved, reflecting the systemic anti-aging effects of restored growth hormone levels beyond just body composition.
What this means for you
This RCT provided hard evidence that sermorelin changes body composition in a clinically meaningful way. A 5% body fat decrease in 5 months -- verified by DEXA, not bathroom scales -- while preserving lean mass is a significant outcome. It confirms that restoring GH levels translates to real physical changes.
Limitations
Small sample size typical of early peptide research. 5-month duration captures initial changes but not long-term body composition trajectory. Participants were all older adults (55-71); younger populations may respond differently. No exercise protocol was standardized.
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