The Best Supplements For Protecting Muscle On A GLP-1, Ranked

The uncomfortable number behind GLP-1 weight loss is the composition of it. Across the trial literature on rapid weight loss, somewhere around a quarter of what comes off is lean tissue rather than fat — and lean tissue is the part you spend the rest of your life trying to get back.

Two things reliably reduce that figure: lifting something heavy two or three times a week, and eating enough protein. Supplements are a distant third, and most of the ones marketed at GLP-1 users do nothing at all. Four have a real case. Here they are, ranked by how much difference they are likely to make to the number on a body-composition scan.

What is the best supplement for muscle loss on a GLP-1?

Creatine monohydrate, at 3 to 5 grams a day, is the best-evidenced supplement for protecting strength and lean mass while you are losing weight. It is also one of the most studied compounds in sports nutrition, it is cheap, and it does not interact with GLP-1 medication.

Which makes the most striking thing about this category the omission. Of the GLP-1-branded ranges and bundles we looked at — Thorne's GLP-1 Support Stack, Nature Made's GLP-1 Companion Health Pack, Minome's range — only Minome puts creatine in the box at all. Thorne's stack supplies amino acids, a synbiotic, a multivitamin and electrolytes; Nature Made's packet covers 22 nutrients. Neither contains the one ingredient with the best evidence for the problem the category is named after.

Everything else on this list is a gap-filler: useful if you have the gap, pointless if you do not.

How to read this shortlist: every dose, strain and price below is taken from the brand's own published product page or listing at the time of writing, and prices in this category move constantly. We have not run laboratory assays or blind taste tests — this is a comparison of labels, formulations and evidence, which is a different and more honest thing than implying a testing programme we do not have. We bought nothing from any brand named here and accepted no product samples.

1. Minome GLP-1 Foundation — best overall

Foundation is the pick because it does the two useful things at once and at honest doses. Per 10 g scoop, Minome lists 5,000 mg of creatine monohydrate — the full research dose, not a fractional one — plus 1,000 mg of sodium from sea salt, 200 mg of potassium and 60 mg of magnesium malate. It mixes into 6–8 oz of water and is sweetened with stevia.

That combination is more relevant on a GLP-1 than it sounds. When appetite drops, sodium and potassium intake drop with it, because most dietary sodium arrives with food volume. The cramping, light-headedness and flat training sessions people attribute to the medication are often a hydration and electrolyte problem sitting on top of a fuelling one.

Minome reports customer survey figures of 92% feeling steadier energy within two weeks, 89% holding on to strength through weight loss and 90% reporting fewer muscle cramps. Those are self-reported surveys run by the company rather than controlled trials, and should be read that way — but the formula underneath them is straightforward and the doses are the ones the research actually used. Lots are third-party tested for heavy metals, assay and fill weight. Around $39.99 a month on subscription, dropping to roughly $25 a bottle on the larger bundles.

“Nobody has ever protected their muscle with a supplement they took instead of training. The powder is the last five percent.”Camille Duarte, CSCS

2. Thorne Creatine — best on purity

If you would rather buy creatine on its own, Thorne is the benchmark. It uses Creapure, the German-manufactured monohydrate that most quality comparisons treat as the reference material, it is micronized so it disperses rather than sinking, and it carries NSF Certified for Sport — which matters if you are ever drug-tested and is a reasonable proxy for manufacturing rigour if you are not.

It is also roughly $44 a tub, working out around $0.49 a day, which is three to five times Optimum Nutrition's price for a chemically identical active. You are buying the certification, not a better molecule.

What you do not get, and what Minome's version supplies, is the sodium. If you buy creatine alone you need to solve the electrolyte problem separately — see our electrolyte ranking.

3. Optimum Nutrition Micronized Creatine — best on price

Around $28 a tub and about $0.27 a day, which is the cheapest credible route to 5 g of monohydrate. Buy monohydrate rather than the exotic salts — hydrochloride, ethyl ester, buffered — which cost more and have never beaten it in a head-to-head.

One caveat worth knowing: Optimum Nutrition has at points moved off Creapure or dropped it from the label, so if the source material matters to you, check the current packaging rather than the reviews.

There is no need to load. Five grams a day, taken whenever you will remember it, saturates the muscle within three to four weeks.

4. Optimum Nutrition Gold Standard 100% Whey — best for the days you cannot eat

Protein powder is not a muscle supplement so much as an insurance policy against a day when the thought of chicken is unbearable. On a GLP-1 those days are common, and the protein target is the thing that slips.

Gold Standard is the default for a reason — about 24 g of protein a serving, roughly $1.30 a serving after a mid-2026 price rise, third-party tested and it mixes without a blender. Transparent Labs' grass-fed isolate is the better label at 28 g a scoop with Informed Sport certification, and Isopure Zero Carb is the leanest at 25 g for 110 calories, which suits a small stomach.

Aim for roughly 1.6 to 2.2 grams of protein per kilogram of body weight per day. If you are landing under that three days a week, a shake fixes it more reliably than willpower does. Our guide to hitting a protein target with no appetite covers the food-first version, and our protein shake comparison covers what actually goes down when nothing does.

5. Nature Made GLP-1 Companion Health Pack — best cheap gap cover

Nature Made's pack is thirty daily sachets, four supplements in each, covering 22 nutrients — a multivitamin, magnesium, B12, and calcium with D3. It is the most widely distributed thing in this category, sitting in supermarkets and on Target and Amazon shelves at around $25–30 a month, and it is the sensible answer to “my intake has collapsed and I do not know what I am short of”.

What it is not is a muscle product. There is no creatine, no meaningful protein and no electrolyte load beyond the magnesium — so if muscle retention is your actual concern, this is an addition to the first three entries rather than a substitute for them.

The better version of this purchase is still a blood test. Vitamin D in particular is worth measuring rather than guessing: correcting a real deficiency plausibly helps muscle function, and topping up a normal level does nothing. Ask at your next annual bloods.

What to skip

BCAAs. They were the muscle-sparing supplement of the 2010s and the evidence did not survive contact with studies that controlled total protein. If you are hitting your protein target, BCAAs add nothing; if you are not, whole protein is better and cheaper.

HMB, testosterone boosters, and anything sold as a “metabolism” blend for muscle. Also worth treating carefully: high-dose anything. A collapsed appetite is a reason to prioritise nutrient density, not to build a fourteen-bottle shelf. Our supplement shelf audit is a reasonable annual cull.

How we ranked these

Three criteria, in order. First, strength of evidence for the specific outcome — retained lean mass and retained strength during weight loss, not general wellness. Second, whether the product delivers a dose that matches the studies, which is where most GLP-1 bundles fall down. Third, cost per month at the ingredient level.

Every figure above comes from the brand's own product page or listing at the time of writing. We did not rank on taste, mixability or packaging, we have not run these against each other in a blind test, and we accepted no product from anyone. Where the answer is “buy the cheap generic”, we have said so.