Hexarelin water retention - not a bug, it's a feature, stop whining about it

[GrumpyOldResearcher]

Ran hexarelin at 100mcg twice daily for 6 weeks. Here's what actually happened.

Week 1-2: nothing dramatic. Some hunger increase, expected. Slight water retention starting around day 10.

Week 3-4: strength numbers moved. Not imagining it. Pull movement PRs went up, recovery between sessions noticeably faster. Sleep quality improved, which matters more than most people give credit for.

Week 5-6: cortisol desensitization issue started showing. This is real and documented and if you're running hexarelin long term without cycling you're doing it wrong. Backed off to 3x weekly by end of week 5.

The water retention complaints I keep seeing on this forum are from people confusing subcutaneous puffiness with being fat. It's not the same thing. Temporary. Goes away. Deal with it.

What I'd do differently: start at 100mcg once daily, not twice. The extra pulse doesn't add proportional benefit and the desensitization hits faster at higher frequency. Wish I'd known that going in instead of reading broscience protocols from 2009.

Cortisol/prolactin sides are real with hexarelin unlike other GHRPs. If you're sensitive to those hormones get bloodwork before touching this compound. That's not optional advice.

[dr_peptide_curious]

The water retention complaints I keep seeing on this forum are from people confusing subcutaneous puffiness with being fat. It's not the same thing. Temporary. Goes away. Deal with it.

I want to specifically defend this point because I have been making essentially the same argument in multiple threads over the past several months and keep running into resistance from people who seem to have decided that any change in body composition aesthetics is categorically unacceptable, regardless of mechanism or duration.

The subcutaneous water retention observed with hexarelin is almost certainly downstream of the GH pulse itself rather than some unique hexarelin-specific pathology. GH-mediated water retention occurs through well-understood mechanisms involving IGF-1 stimulation of renal sodium reabsorption and direct effects on aquaporin channels. This is not hexarelin doing something unusual. This is GH doing what GH does. Anyone who has read the foundational clinical literature on recombinant GH therapy in GH-deficient adults will recognize this pattern immediately. The retention is transient, dose-dependent, and resolves upon cessation or dose reduction. Presenting it as some alarming side effect to be avoided at all costs reflects a fundamental misreading of the pharmacology.

Cortisol/prolactin sides are real with hexarelin unlike other GHRPs. If you're sensitive to those hormones get bloodwork before touching this compound. That's not optional advice.

Also strongly agree here, and this is actually the point I would emphasize above everything else. The cortisol and prolactin stimulation from hexarelin is genuinely differentiated from other compounds in the GHRP class and is not merely theoretical. There is published data on this going back to early characterization work. The desensitization issue you mention for the GH axis is real, but the cortisol axis behavior is the part that warrants more caution than most self-researchers apply.

Your protocol adjustment moving to 3x weekly by week 5 is sensible and consistent with what the receptor biology would predict. I would push back only mildly on the framing that twice daily was categorically wrong from the start. The data on pulsatile optimization suggest individual variability in receptor downregulation kinetics is substantial, so what hit you by week 5 at that frequency might be week 8 for another individual. That is precisely why baseline bloodwork and ongoing monitoring are non-negotiable rather than aspirational.

Solid writeup overall.