For Research Use Only · Not For Human Consumption
Quick answer

Best time of day to dose CJC-1295/Ipamorelin?

2 min readUpdated 24 May 2026PX1 Labs Research Library

The commonly-cited timing is before bed, on an empty stomach — to line up with the body's natural overnight growth-hormone pulse.

Why night, empty stomach

Growth hormone releases in pulses, the largest around deep sleep. Dosing before bed lines up with that pulse, and away from food because high insulin from a recent meal can blunt the response. A post-workout window is the other commonly-referenced timing.

Reference only

This is commonly-cited community timing, not a dosing instruction or medical advice. See the product page and consult a professional.

Frequently asked questions

Empty stomach — how long?

References commonly suggest leaving a gap of roughly an hour or two around food, since insulin can blunt the GH response. Reference information only.

Continue reading

Browse catalog