Peptide science at the intersection of diet, metabolism, and performance.
An independent reference on how peptides interact with diet, metabolism, body composition, and training. No supplements sold. No affiliates. No agenda.
How peptides affect fat oxidation, muscle retention, and metabolic rate during energy restriction.
Growth hormone axis peptides, mTOR, protein synthesis, and what training stimulus has to do with it.
Peptide interactions with fasting windows, ketosis, autophagy, and insulin signalling.
Pre- and post-training peptide timing, recovery nutrition context, and substrate utilisation.
Several peptides studied in metabolic contexts — including BPC-157, GLP-1 analogues, and certain GH secretagogues — show effects on insulin sensitivity, but through different mechanisms and with very different evidence quality. Grouping them as 'peptides that improve insulin sensitivity' obscures more than it reveals.
GH-releasing peptides (GHRPs and GHRHs) are strongly inhibited by insulin. Administering them in the post-workout window — when carbohydrate intake spikes insulin — significantly blunts the GH pulse they would otherwise produce. Timing these peptides in a fasted or low-insulin state is essential for efficacy.
Fasting state appears to enhance BPC-157's gut healing effects based on animal data, likely because reduced luminal content allows greater mucosal contact and the fasted metabolic state upregulates repair pathways BPC-157 amplifies. No human studies have directly tested this interaction.
Peptidegenics covers the intersection of peptide biochemistry, nutrition science, and metabolic physiology. Every article is grounded in published research. Nothing is sold here.
The Metabolic Applicability Rating on each article answers the question the performance-focused reader actually asks: does this evidence apply to how I actually eat and train, or is this a lab finding I cannot act on?