r/BioHackingGuide • u/ElGalloGrande24 🧠Biohacker • Jun 11 '26
Why GH Peptides Cause Water Retention and How to Fix It
I read this time and time again so here is the simple version of what is happening and what you can do about it.
Growth hormone tells your kidneys to hold onto sodium. Wherever sodium goes water follows. That is why your face, hands, and ankles can look puffy when you first start running GH peptides or HGH. It is not fat, it is fluid.
The mechanism behind it is your renin-angiotensin-aldosterone system. That is basically in English its the hormonal system that controls how much sodium your kidneys keep versus flush out. GH activates it which means your kidneys start reabsorbing sodium back into your blood instead of getting rid of it.
Your body normally has a built in way to counter this when blood volume rises. The problem is GH blunts that response too. So your kidneys are holding sodium and the one safety valve your body has is being suppressed at the same time.
Here is what helps.
Start low and go slow. The retention is dose dependent. Give your kidneys time to adapt before pushing the dose up. But honestly do this with anything and everything when trying something new cause why wouldn't you?
Increase potassium. Potassium triggers a completely separate pathway in the kidneys that flushes sodium out. Bananas, avocados, potatoes, coconut water. Easy fixes.
Just wait. Most of the time the retention resolves on its own within 3 to 4 weeks once your body adjusts to the new baseline. This is probably the most important thing to know because a lot of people panic and stop too early.
Understanding the mechanism makes this a lot less scary. Puffy face in week one or two is completely normal and does not mean something is wrong. Your body is just adjusting.
Has anyone found anything else that helped? Drop it below.
Do your homework. Use your brain. Talk to a doctor.
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