Best Supplements for Ozempic & GLP-1 Users (2026)
GLP-1 medications change how you absorb and use nutrients. Rapid weight loss depletes magnesium faster. Suppressed appetite leads to nutritional gaps. Changed gut motility creates GI side effects that standard probiotic advice doesn't address. Generic supplement recommendations don't account for any of this. Here are the three supplements with the strongest evidence specifically for GLP-1 users, what they do, why they matter on these medications, and which brands meet the quality bar.
Three Supplements With Real Evidence
Most GLP-1 supplement lists are generic health product roundups. These three are different. Each one has clinical data tied to the specific problems GLP-1 users face: muscle loss, GI side effects, and nutrient gaps from eating very little.
| Supplement | What It Fixes | Priority |
|---|---|---|
| Creatine | Muscle loss during weight loss | #1, Start right away |
| Probiotic | Nausea, bloating, constipation | #2, Start with the drug |
| Magnesium | Low levels from eating less | #3, Add in first month |
How to Take Creatine on GLP-1
Creatine is simple. Five grams per day. No loading phase. No cycling. Take it the same time each day. Mix it in water or a protein shake. It has no taste.
One note: creatine pulls water into muscle cells. You may see the scale go up 1-2 lbs in the first week. That is water inside your muscles. It is not fat. Do not stop.
When to Start Each Supplement
Do not start all three at once. If one causes a problem, you will not know which one it was.
- Week 1Start the probiotic. GI side effects hit hardest in the first few weeks. Get ahead of it.
- Week 2Add magnesium at night. Low food intake depletes it fast. It also helps with sleep.
- Week 4Add creatine. Your body has had time to adjust. Start 5g per day and keep it there.
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Frequently Asked Questions
What supplements should I take on Ozempic?
At minimum: creatine monohydrate (5g daily for muscle preservation), a high-quality multi-strain probiotic (for GI side effects), and magnesium bisglycinate (for deficiency that accelerates during weight loss). Many users also benefit from B12 and Vitamin D supplementation, particularly if dietary intake is low due to suppressed appetite.
Can I take vitamins with GLP-1 medications?
Yes. GLP-1 receptor agonists like semaglutide and tirzepatide do not interact with standard vitamins or mineral supplements. There are no pharmacological interactions to be concerned about. The bigger issue is that suppressed appetite means many GLP-1 users eat too little and develop nutritional gaps, supplementation helps close those gaps.
Why is creatine important on GLP-1?
During rapid caloric restriction, the body breaks down both fat and muscle for energy. Creatine monohydrate has stronger clinical evidence for preserving lean muscle mass during a caloric deficit than any other supplement. Multiple studies show 5g per day maintains strength and muscle volume even during significant weight loss. On GLP-1 medications where rapid weight loss is common, creatine is the most important supplement to take.
Are probiotics necessary on Wegovy?
Not mandatory, but 30-40% of GLP-1 users experience GI side effects including nausea, constipation, and digestive discomfort. Probiotics directly address these issues by supporting gut microbiome balance and motility. If you're in the 60-70% who tolerate GLP-1 GI effects well, probiotics are still beneficial but less urgent. If you're struggling with nausea or constipation, a high-quality multi-strain probiotic should be one of your first purchases.
Also Read: Best Protein Powders for GLP-1 Users
Supplements and protein work together. See our ranked protein recommendations for Ozempic and Wegovy users.