What You'll Learn
Table of Contents
Legion Whey+
Protein comes first on this ranking for the reason the page gives: it is the one that protects lean mass. A whey isolate is 22 g per serving with no proprietary blend.
Check price at Legion →Disclosure: we earn a commission if you buy through this link, at no extra cost to you. It does not change what this page says. Supplements do not treat or replace a GLP-1 medication, and nothing here is medical advice.
Strong Rationale
These two have a direct, specific, multi-society-backed rationale for GLP-1 users — not just general population evidence.
The 2025 ACLM/ASN/OMA/TOS joint advisory sets a specific target (1.2–1.6 g/kg/day) for this exact population, directly tied to preventing lean mass loss. See our full muscle-loss guide for the target and the training side of this.
Best whey protein picks →Reduced food and fluid intake can create a genuine electrolyte gap on GLP-1 therapy — a direct, mechanism-based rationale rather than a general wellness claim.
Full electrolytes guide →Reasonable, Situational
Not universally necessary, but a sensible addition for specific, identifiable gaps.
Directly relevant to the constipation risk covered in our side effects guide, if food-based fiber intake isn't enough on its own.
Sometimes used for constipation and general electrolyte support; not a formally mandated GLP-1-specific supplement.
Magnesium guide →Reasonable given generally low U.S. population vitamin D status plus reduced food intake — not GLP-1-specific guidance, but a sensible general precaution.
Best vitamin D3+K2 picks →A reasonable precaution given reduced food volume, though not a universal formal requirement — worth discussing with a clinician based on individual diet quality.
Weak or Extrapolated Evidence, Specific to GLP-1
These have real general-population evidence behind them — but not GLP-1-specific trials. The case for using them here is extrapolated, not direct, and that distinction matters.
Strong general evidence for strength and lean mass during resistance training. No dedicated GLP-1-specific RCTs yet — the rationale here borrows from general sports-nutrition evidence.
Full creatine guide →General cardiovascular and anti-inflammatory rationale, not a GLP-1-specific side-effect claim.
Best omega-3 picks →Modest general evidence for skin and joint support; not GLP-1-specific. Lower priority than the items above it.
Plausible given the gut microbiota changes observed with GLP-1 therapy, but dedicated trials in this exact population are still limited.
Probiotics guide →What to Skip
Be skeptical of any product marketed specifically as an "Ozempic supplement" or "GLP-1 booster." No supplement replicates or meaningfully enhances the pharmacologic mechanism of a GLP-1 receptor agonist. If a product claims to "boost" your GLP-1 medication's effect, that claim is not supported by the evidence base this guide draws from — treat it as a marketing claim, not a clinical one.
How to Choose a Product
- Third-party tested — look for NSF Certified for Sport or Informed Sport where relevant, especially for protein powders.
- Match the dose to the evidence, not the label's largest number — more isn't automatically better.
- GI tolerance matters more here than usual. A supplement that's fine on a normal diet can be harder to tolerate on top of GLP-1-related GI symptoms — introduce one at a time.
- Whole foods first, supplements to close gaps — this ranking is a prioritization tool, not a shopping list to buy in full.
Bottom line: Two supplements (protein, electrolytes) have a real, specific case for GLP-1 users. Everything else is either situational or borrowed from general evidence — useful, but not essential in the way marketing often implies.
