I cannot do what I do without the support of Orion Peptides and the educational content they help make possible. Use code Parker15 for 15% off. One of the most repeated claims in the peptide space is this: “You need to cycle off peptides.” It gets said so often that most people assume it’s established science. But when you actually look at the research, the idea doesn’t come from peptide biology at all. It comes from steroid biology. And those are two completely different systems. Where the Cycling Idea Actually Comes From Cycling makes sense in the context of anabolic steroids. When exogenous testosterone is introduced, the body detects elevated hormone levels. The pituitary reduces or shuts down natural production. That’s why steroid users cycle: • to allow endogenous hormone production to recover• to reduce long-term suppression• to manage hormonal balance So the idea of “cycling” is rooted in hormone suppression physiology. The key point: That mechanism applies to steroids, not peptides. Why Peptides Work Differently Peptides generally do not replace hormones in the body. Instead, they act as signalling molecules. They communicate with existing systems and encourage biological activity. They do not typically override endocrine production in the same way exogenous hormones do. That difference matters. GH Secretagogues: A Different Mechanism Entirely Compounds like: • CJC-1295 • Ipamorelin work by stimulating the pituitary gland to release growth hormone. They do not supply growth hormone externally. They signal your body to produce its own. Research on GH secretagogues has not shown the same type of shutdown pattern seen with exogenous hormone use. That is a fundamental distinction. Repair Peptides and Signalling Molecules Other commonly discussed peptides such as: • BPC-157 • TB-500 are studied primarily as signalling and repair-related molecules. Current research does not describe classic endocrine suppression pathways for these compounds.

I cannot do what I do without the support of Orion Peptides and the educational content they help make possible. Use code Parker15 for 15% off. One of the most overlooked parts of peptide use in research settings is not the compounds themselves, but the monitoring that should go alongside them. Peptides can have meaningful biological effects, but like any active compound interacting with human physiology, they can also influence different systems in the body. That’s why understanding lab work is just as important as understanding mechanisms. The goal is simple: Safety first, optimisation second. Why Lab Monitoring Matters Any compound that influences signalling pathways, metabolism, or tissue repair can potentially affect: • kidney function • liver enzymes • blood counts • inflammatory markers • hormonal pathways Even when compounds are well tolerated, biological systems still adapt and respond. Monitoring helps ensure those adaptations stay within healthy ranges. Growth Hormone (GH) Peptides For peptides that influence growth hormone signalling, such as GH secretagogues: Key marker: • IGF-1 levels IGF-1 provides a useful indirect indicator of GH activity and downstream metabolic signalling. Tracking this helps understand how strongly the pathway is being activated. NAD+ Related Protocols For NAD+ related compounds or metabolic support protocols: Key markers: • fasting glucose • liver function tests (ALT, AST) These markers help assess metabolic balance and hepatic processing over time. BPC-157 For peptides studied in tissue repair and inflammation modulation: Key markers: • kidney function (creatinine, eGFR) • complete blood count (CBC) These help monitor systemic response and general physiological stability. GHK-Cu For copper-based peptides involved in tissue regeneration pathways: Key markers: • liver function tests • serum copper levels • CRP (C-reactive protein) These provide insight into both metabolic handling and inflammatory status.