[Combined effects of injected 1-29 GRF and diet energy level in lactating goats].
Sauvant. D D; Kann. G G; Hervieu. J J; Mandran. N N; Disenhaus. C C
Key Findings
- Both subcutaneous GRF‑1‑29 injections and higher dietary energy independently increased milk production in goats.
- The two factors combined had an additive effect on milk yield, with some interactions affecting milk fat and protein levels.
- Subcutaneous injection was less efficient at stimulating milk secretion than intravenous injection in a prior experiment.
Practical Outcomes
- For biohackers, the study offers limited direct guidance because it was done in lactating goats, not humans. It does suggest that the route of administration matters—IV may be more potent than subcutaneous—but translating doses and effects to people would require much more research.
Summary
In a study with dairy goats, giving them the peptide GRF‑1‑29 under the skin and feeding them higher‑energy diets each boosted milk output, and together they added up. However, injecting the peptide under the skin was not as effective as the intravenous method used before.
Abstract
Subcutaneous injections of 1-29 GRF and diet energy level were studied in 48 dairy goats using a 2 x 2 factorial design. Energy and GRF effects were additive on milk production and some interactions were observed on the milk fat and protein contents. Subcutaneous injections seemed to be less efficient in promoting milk secretion than the intravenous route used in a previous trial.
Study Information
pubmed
1990