GLP-1 medications, including semaglutide (Ozempic, Wegovy), tirzepatide (Mounjaro, Zepbound), and others, have reshaped how people approach weight loss and type 2 diabetes. They quiet appetite, slow digestion, and help people lose a meaningful amount of weight. But two consequences of how well they work open a gap that the right supplements can help fill:
- You lose muscle along with the fat. In the STEP-1 trial of semaglutide, roughly 40% of the weight people lost was lean mass (mostly muscle), not fat. Tirzepatide ran better in SURMOUNT-1 at around 25%, but either way, a real chunk of the scale's drop can be muscle.
- You eat far less, so you take in fewer nutrients. A smaller appetite means less protein and fewer vitamins and minerals reaching your body, exactly when it needs them to hold onto that muscle.
No supplement replaces the medication, a protein-forward diet, or your doctor's guidance. But a small, well-chosen stack can help you protect muscle, cover the nutrient gaps a tiny appetite leaves behind, and take the edge off nausea and constipation. Here's what the evidence actually supports, and what to skip.
First, the part that matters most (and it isn't a pill)
Before any supplement: protein plus resistance training is the foundation of keeping muscle on a GLP-1. Nothing in a bottle outperforms it. Most clinicians suggest aiming for protein at every meal. A common target is roughly 1.0 to 1.5 grams of protein per kilogram of body weight per day (about 25 to 40 g per meal), though the right number is individual, so confirm it with your provider. Pair that with some form of strength training two to three times a week, and you give your body a reason to keep the muscle instead of burning it for fuel.
When your appetite is tiny, a protein shake (whey or a plant blend) is often the single most useful "supplement" there is. A 30 g shake can be far easier to get down than a full meal. Everything below works around that foundation, not instead of it.
1) Protect your muscle
Creatine monohydrate
Creatine monohydrate is the most-researched sports supplement in existence, and its job on a GLP-1 is simple: paired with resistance training, it helps preserve strength and lean mass while you're in a calorie deficit. The dose is 3 to 5 g a day, every day, with no loading phase needed. It's inexpensive, well tolerated, and one of the very few supplements with strong human evidence behind muscle preservation. Drink enough water, since creatine pulls a little into the muscle.
HMB
HMB (β-hydroxy β-methylbutyrate), a metabolite of the amino acid leucine, may help blunt muscle breakdown during catabolic periods like rapid weight loss. The evidence is strongest in older adults and during aggressive dieting or bed rest. A typical dose is about 3 g/day. It's a reasonable add-on if you're older or losing weight quickly, though it sits a clear step below protein and creatine in priority.
2) Replace the nutrients a small appetite misses
When you're eating half as much food, you're often getting half the micronutrients. A few worth paying attention to:
- A basic multivitamin is cheap insurance when overall food intake drops.
- Vitamin B12 and vitamin D are two of the most commonly low nutrients when intake falls. Ask your provider about checking your levels rather than guessing.
- Magnesium gets depleted by GI side effects, and the glycinate form is gentle on the stomach while supporting sleep and regularity. (Skip magnesium citrate at night if your stools are already loose, since it's a mild laxative.)
- Potassium can fall with vomiting or diarrhea, but get this one from food and bloodwork first. High-dose potassium supplements can be genuinely risky and should only be used under medical supervision.
3) Take the edge off the side effects
Nausea → ginger
Ginger is one of the better-studied natural options for nausea, with the strongest evidence in pregnancy- and surgery-related nausea. Most research lands around 1,000 to 1,500 mg/day in divided doses, taken as tea, capsules, or chews. It won't override severe nausea, but it can help with the everyday queasiness of the first few weeks or a dose increase.
Constipation → soluble fiber
Slowed digestion plus less food often means constipation. A gentle soluble fiber like psyllium or inulin, with plenty of water, can help keep you regular. Start with a small dose to avoid bloating and ramp up. Important: take fiber and any oral medications a couple of hours apart, since fiber can blunt how well other things are absorbed.
The "GI lows" → electrolytes & fluids
The vomiting or diarrhea that can show up early costs you fluids and electrolytes (sodium, potassium, magnesium), which is a big part of why people feel wiped out and lightheaded. An electrolyte mix, or simply being deliberate about water and salt, helps. If fatigue lingers, our energy & fatigue guide covers more options. And if slowed stomach emptying brings on reflux or "Ozempic burps," smaller, lower-fat meals usually help more than any pill. See our acid reflux guide.
What you probably DON'T need (and a couple of cautions)
- "Nature's Ozempic" supplements. Berberine gets marketed as a natural GLP-1, but it isn't, and it doesn't replicate semaglutide. If you're already on a GLP-1, stacking berberine for blood sugar could theoretically push you toward lows. We dug into what berberine actually does in our berberine guide. But on a GLP-1, clear it with your provider first.
- Mega-doses of fat-soluble vitamins (A, D, E, K). More isn't better; these accumulate in the body. Test, then supplement to fill an actual gap.
- Stimulant "fat burners" and metabolism boosters. Unnecessary, and a poor mix with an appetite-suppressing medication.
A simple starting stack
Run this by your prescriber first
- Protein: enough to hit ~25 to 40 g per meal (a shake counts)
- Creatine monohydrate: 3 to 5 g/day, every day
- Vitamin D + B12: if your bloodwork shows you're low
- Magnesium glycinate: ~200 to 400 mg in the evening
- Ginger: 1,000 to 1,500 mg/day, as needed for nausea
- Psyllium or inulin: for constipation, taken away from other meds
- Electrolytes: on days with GI symptoms
That's five to seven things, not twenty. The goal is to support what the medication is doing: protect your muscle, refill what a small appetite misses, and smooth the rough edges, not crowd it with a cabinet full of pills.
Want our current product picks for each of these? See our curated list:
See our GLP-1 supplement picks →
Frequently asked questions
Will supplements stop GLP-1 side effects?
No, but they may take the edge off. Ginger can ease mild nausea and soluble fiber can help with constipation, but persistent or severe side effects are a conversation for your prescriber, who may adjust your dose or timing.
How much protein should I eat on Ozempic or Wegovy?
Many clinicians aim for roughly 1.0-1.5 g of protein per kg of body weight per day (about 25-40 g per meal), but the right number depends on you, so confirm with your provider. A protein shake is an easy way to get there when your appetite is small.
Is creatine worth taking on a GLP-1?
For most people doing any resistance training, yes. At 3-5 g/day, creatine monohydrate is one of the few supplements with solid evidence for helping preserve strength and lean mass during weight loss, and it's inexpensive and well tolerated.
Can I take berberine with Ozempic?
Berberine is not a natural substitute for a GLP-1 and doesn't replicate semaglutide. Combining the two for blood-sugar control could add up in ways you don't want, so don't stack them without talking to your provider.
The bottom line
GLP-1s do the heavy lifting; supplements just cover the gaps they leave behind. Protein and strength training protect your muscle, a few targeted vitamins and minerals replace what a smaller appetite misses, and ginger and fiber smooth out the side effects. Keep it simple, keep it evidence-based, and keep your prescriber in the loop on everything you add.