[Effects of GRF 1-29 in normal and hypotrophic lambs].
Pastoureau. P P; Barenton. B B; Blanchard. M M; Boivin. G G; Charrier. J J; Dulor. J P JP; Theriez. M M
Key Findings
- hGRF injection caused a rapid increase in GH secretion, with a stronger response in hypotrophic (undernourished) lambs.
- Treated lambs showed reduced lipid retention and lower overall energy levels.
- Calcium and phosphorus content in the body increased, indicating enhanced bone mineralization.
- GRF stimulated production of Sm‑C (a cartilage marker) and promoted chondrocyte proliferation, supporting skeletal growth.
Practical Outcomes
- The study confirms that GRF‑1‑29 can effectively raise GH levels and alter body composition in animals, but because it was done in lambs, the results are not directly transferable to humans. Biohackers may view this as supporting evidence for GH‑releasing peptides, yet they still need human data on dosing, safety, and efficacy before applying it to longevity or performance protocols.
Summary
Injecting GRF‑1‑29 into lambs quickly boosted their growth hormone levels, especially in under‑nourished animals. The treatment also shifted body composition by lowering fat storage and raising calcium and phosphorus in the bones, suggesting it can influence both metabolism and skeletal growth in ruminants.
Abstract
Injections of hGRF rapidly stimulated GH secretion in lamb and this response was significantly higher in hypotrophic than in normal lambs. The treatment had an effect on body composition reducing the retention of lipids and the energy level and increasing calcium and phosphorus content. The results showed that GRF affected both metabolism and skeletal growth of ruminants, stimulating specially the production of Sm-C and proliferation of chondrocytes.
Study Information
pubmed
1988