Hi -,
The peptide community has a fasting problem. Not the kind you think.
Every conversation about GHRH analogs and growth hormone secretagogues eventually circles back to the same question. Tesamorelin, sermorelin, CJC-1295, or ipamorelin—the compound barely matters. Do you have to inject while fasted? Will food blunt the response? Should you skip breakfast, time it pre-bed, or hold off carbs for 90 minutes?
Fasting does sharpen the acute pulse. The free fatty acids and somatostatin that rise after a meal blunt a single growth hormone pulse, and the studies on that are clear. If you can dose fasted, there's no reason not to.
But the cultural fixation has gone past what the data supports. Tesamorelin's phase III trial dosed between 6 a.m. and noon with no fasting requirement and still produced the full clinical result. Continuous infusions that ran around the clock through three meals a day kept IGF-1 up for weeks. Children grew on year-long pumps that ran through every meal of every day.
The chronic IGF-1 axis that drives the outcomes people actually want isn't pulse-height dependent in the way the fasting argument assumes.
The full piece unpacks what fasting actually optimizes, what it doesn't, and why peptide protocols deserve more nuanced guidance than "fast or it doesn't work." This is exactly the kind of decision that benefits from someone in your corner who understands the physiology, isn't fear-mongering, and wants you to actually succeed.
Read the full breakdown here.
