Best Supplements for Muscle Loss on GLP-1 (Ozempic) in 2026: What Actually Preserves Lean Mass

If you are losing weight on a GLP-1 drug like Ozempic, Wegovy, Mounjaro, or Zepbound, a large share of what you lose is muscle - and the honest supplement list to protect it is short: protein first, creatine second, and both of them only work if you are resistance training. Training is the real lever; supplements are the supporting cast that makes it work. HMB and EAAs get marketed hard for "muscle sparing," but they are lower-priority and mostly unnecessary once your protein intake is adequate. Below is what the STEP and SURMOUNT trials and the International Society of Sports Nutrition actually show, with the $/serving and third-party-certification detail no one else publishes - and the honest reasons to spend on the two things that matter and skip the rest.

How we sourced this · not medical advice. Every figure on this page is cited to a named authority - the published STEP-1 and SURMOUNT-1 trials, International Society of Sports Nutrition position stands, or the NIH Office of Dietary Supplements. Supplements are not a substitute for food, resistance training, or your prescriber's guidance. Talk to your doctor or a registered dietitian before starting anything, especially if you have kidney disease, take other medications, or are pregnant. Some links are affiliate links that support this site at no cost to you; they never change our rankings.

Why you lose muscle on a GLP-1

Rapid weight loss always costs some muscle, and GLP-1 drugs drive rapid weight loss. The mechanism is straightforward: these drugs suppress appetite, so people eat far less - roughly 16 to 39 percent fewer calories by one 2025 analysis (Frontiers in Nutrition 2025) - and when you are in a steep energy deficit without a strong training and protein stimulus, the body breaks down lean tissue alongside fat. The trials put real numbers on it. In the STEP-1 trial of semaglutide 2.4 mg, participants lost 15.0% of body weight over 68 weeks, and a body-composition analysis found roughly 40% of the weight lost was lean mass - about a 10% drop in muscle (Prado et al., Diabetes, Obesity & Metabolism 2024). The tirzepatide SURMOUNT-1 DXA substudy found a somewhat gentler split - about 25% of total weight lost was lean mass (a 74/26 fat-to-lean ratio) over 72 weeks (Look et al., DOM 2025).

There is a genuine nuance the trials also show, and honesty requires stating it: because so much fat is lost, lean mass as a proportion of body weight actually improves - lean mass rose about 3 percentage points as a share of body weight in the STEP-1 composition data (McGowan/Wilding, J Endocrine Soc 2021). So you are not "wasting away." But absolute muscle still falls, muscle is metabolically and functionally valuable, and losing it makes it easier to regain fat later - the same rapid, low-intake weight loss also opens documented micronutrient gaps, as Harvard Health notes. Preserving muscle is worth the effort - and that is where the two supplements below, on top of training, earn their place.

#1 Protein: the single highest-value move

Protein is the number-one supplement for preserving muscle on a GLP-1, for one blunt reason: it supplies the raw material your muscle needs to resist breakdown, and appetite suppression makes hitting the target genuinely hard from food alone. The International Society of Sports Nutrition position stand recommends 1.4-2.0 g of protein per kg of body weight per day for anyone training, and 2.3-3.1 g/kg during an aggressive caloric deficit to preserve fat-free mass, spread across meals at roughly 20-40 g each to maximize muscle protein synthesis (Jäger et al., ISSN Protein Position Stand 2017). Make it concrete: a 75 kg (165 lb) person aiming for the muscle-sparing high end is targeting well over 150 g of protein a day on a suppressed appetite. That is why a high-quality protein powder is the most useful single purchase on this page - it lets you hit the target in calories you can actually stomach.

Up to 40% of the weight lost on semaglutide was lean mass. Protein and resistance training are how you keep it - and appetite suppression is exactly why a protein supplement earns its place.Prado et al., Diabetes Obesity & Metabolism 2024 · Jäger et al., ISSN 2017

#2 Creatine: the most evidence-backed lean-mass aid

Creatine monohydrate is the number-two supplement for muscle preservation, and it is the most evidence-backed lean-mass aid in all of sports nutrition. The ISSN calls it "the most effective ergogenic nutritional supplement currently available" for increasing lean body mass and high-intensity exercise capacity during training (Kreider et al., ISSN Creatine Position Stand 2017). The protocol is simple: a flat 3-5 g/day, every day, no loading phase required, and it is safe well beyond that dose. The critical honesty caveat is that creatine only helps when paired with resistance training - it amplifies the training signal; it does not preserve muscle on its own. On a GLP-1, some of creatine's early "gain" is water drawn into muscle, which is harmless and even helpful for muscle function, but it means the scale is not the way to judge it.

The honest take on HMB and EAAs

HMB and essential amino acids (EAAs) are the two supplements most aggressively marketed as "muscle sparing" for people in a deficit, so they deserve a straight answer: they are real, they are not scams, and they are mostly unnecessary once your protein intake is adequate. Start with HMB. The ISSN's position stand concludes that 38 mg/kg/day of HMB combined with exercise "may improve body composition," but notes the benefit is clearest in untrained individuals and in studies with tightly controlled diets, while results in trained people are "mixed" (Wilson et al., ISSN HMB Position Stand 2013). HMB is a metabolite of leucine - which you already get in quantity from a protein target of 1.6-2.2 g/kg - so once your protein is dialed in, the incremental case for HMB is thin.

EAAs face the same logic. Controlled muscle-protein-synthesis studies find that when protein intake is adequate, a leucine-enriched EAA blend offers a "negligible advantage over whey protein" for stimulating muscle protein synthesis - it is the leucine content and a complete amino-acid profile that drive the response, both of which a normal whey or complete-protein serving already delivers (Muscle protein synthesis with and without added leucine vs whey, PMC 2024). In other words, if you are already hitting your protein target, EAAs are largely buying you an amino-acid profile you have covered. Where EAAs can make sense is a narrow case: someone who genuinely cannot tolerate enough whole protein or protein powder because of GLP-1 nausea, and needs a low-volume way to get amino acids in. For most people, the money is far better spent on protein and creatine.

Once protein is adequate, a leucine-enriched EAA blend offers a negligible advantage over whey - and HMB's clearest benefit is in untrained people with controlled diets. Do not let either crowd out the two supplements that work.ISSN HMB Position Stand 2013 · MPS leucine/whey trial 2024

Resistance training is the non-negotiable foundation

Resistance training is the actual lever for keeping muscle on a GLP-1, and no supplement on this page works without it. The review by Prado and colleagues is explicit that exercise is effective for maintaining muscle during caloric restriction, and that combining resistance training with an incretin drug loses more fat than either intervention alone (Prado et al., DOM 2024). The mechanism is that lifting sends the mechanical signal that tells your body to hold onto lean tissue while it burns fat for energy; protein supplies the building blocks and creatine amplifies the effect, but the signal has to come from training. Two to three resistance sessions a week hitting the major muscle groups is the evidence-backed minimum - progressive load matters more than volume or equipment. If you do only one thing from this page, lift; if you do two, lift and hit your protein target. Read our full guide to preventing muscle loss on a GLP-1 for programming detail.

The verdict table: what to buy, what to skip

Here is the whole decision in one view, ranked by how strongly the evidence supports each item for preserving muscle on a GLP-1. The point is not to buy all of it - it is to spend on the top two and stop.

Frequently asked questions

What is the best supplement to prevent muscle loss on Ozempic? Protein, by a wide margin, because appetite suppression makes hitting a muscle-sparing protein target hard from food alone. Creatine is a strong second. But both only preserve muscle when you are also resistance training - training is the actual lever.

How much protein do I need on a GLP-1 to keep muscle? The ISSN recommends 1.4-2.0 g/kg/day for anyone training, and 2.3-3.1 g/kg during an aggressive deficit to preserve fat-free mass. For a 75 kg person that is roughly 120-230 g a day, spread across meals at 20-40 g each. See our muscle-loss-prevention guide.

Is HMB worth taking on a GLP-1? Probably not as a priority. HMB is a leucine metabolite, and if you are already hitting your protein target you are getting plenty of leucine. The ISSN notes its clearest benefits are in untrained people with tightly controlled diets. Spend on protein and creatine first.

Do I need EAAs if I take protein powder? No. Controlled studies show a leucine-enriched EAA blend offers a negligible advantage over whey when protein intake is adequate. EAAs are only a sensible niche buy if GLP-1 nausea stops you from getting enough whole protein or powder in.

Does creatine cause weight gain on Ozempic? Creatine can add a small amount of water weight in muscle early on, which is harmless and actually supports muscle function. It is not fat and it is not the drug failing - judge creatine by strength and how you feel, not the scale.

Bottom line

Keeping muscle on a GLP-1 comes down to a short, honest list: resistance train (the lever nothing replaces), hit a protein target of 1.6-2.2 g/kg - higher in a steep deficit - and add 3-5 g of creatine a day if you are training. That is the whole evidence-backed program. HMB and EAAs are real but marginal once your protein is adequate, so do not let clever marketing pull your money away from the two supplements and the one habit that actually work. Buy a third-party-certified protein and creatine, lift two to three times a week, and skip the rest - the trials are clear that this is where muscle is won or lost.