Magnesium (Glycinate)
Electrolyte that drops with GLP-1 GI side effects and high-dose injection cycles.
What it is
Essential mineral. Glycinate form is the most bioavailable and least likely to cause loose stools. Required for 300+ enzymatic reactions including ATP synthesis and nerve function.
Why peptide users take it
GLP-1 users on tirzepatide/retatrutide get diarrhea and reduced food intake; both deplete magnesium. Symptoms: muscle cramps, fatigue, poor sleep, irritability. Many users dismiss these as 'just the peptide' when it's actually correctable.
Pairs with these peptides
How it actually works
Dose
When to take
Signs you actually need this
Signs it's working
Common mistakes
Where to buy
Editorial picks. Brand selection follows the quality criteria (USP/NSF or third-party COA where possible). Affiliate links — see the disclosure at the bottom of /supplements.
Caveats
- Avoid magnesium oxide — poor absorption, mostly causes diarrhea.
- Don't stack with high-dose calcium at the same time; they compete.
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