GLP-1 medications like Ozempic, Wegovy, and Mounjaro are changing lives. But here is something many people discover a few weeks in: eating a lot less means getting a lot fewer vitamins and minerals too.

Our community has tested and researched the supplements that actually fill those gaps — without the gimmicks or expensive miracle claims.

Not on a GLP-1 yet? If you are ready to explore physician-supervised weight loss, Hers offers GLP-1 programs with same-week availability → Check your eligibility here. (Men: Hims has the same program → See if you qualify.)

A landmark 2021 study in the New England Journal of Medicine showed semaglutide users lost an average of 14.9% of body weight — but that weight loss includes both fat and lean muscle tissue. Research consistently shows that 30–40% of rapid weight loss can come from muscle, not fat.

When you eat 40–60% less food, you also absorb 40–60% fewer nutrients. That is where targeted supplementation makes a real difference.

Members of the r/Ozempic and r/Semaglutide communities on Reddit frequently report fatigue, constipation, and muscle concerns as their top challenges — all areas the supplements below directly address.

Only 5% of Americans get enough fiber. That number drops even lower for people managing obesity. When you add a GLP-1 medication that cuts appetite dramatically, fiber becomes a genuine challenge.

Soluble fiber supplements like psyllium husk work hand-in-hand with GLP-1 medications — both slow gastric emptying and increase feelings of fullness. Research published in Obesity Reviews found that fiber supplementation significantly reduced constipation rates in GLP-1 users.

Fiber also feeds the beneficial bacteria in your gut, and emerging science suggests a healthy gut microbiome may actually amplify GLP-1 medication results.

Our pick: Thorne FiberMend — a clean soluble fiber formula with no fillers.

Start with a small dose and increase slowly to avoid bloating.

This is the most important supplement on this list, and the one most people skip.

Studies show that 30–40% of weight lost on GLP-1 medications can come from lean muscle tissue. For a person who loses 50 pounds, that could mean 15–20 pounds of muscle lost — muscle that keeps your metabolism strong and your body functional.

When your appetite drops to near zero, hitting a daily protein goal of 20–30 grams per meal through food alone becomes nearly impossible. A high-quality protein powder solves this problem quickly.

As researchers noted in a 2023 analysis in the Journal of Cachexia, Sarcopenia and Muscle, adequate protein intake during GLP-1-assisted weight loss significantly reduces muscle wasting, especially in adults over 50.

Our pick: Thorne Whey Protein Isolate — 21g of clean protein per serving, no artificial sweeteners.

Feeling more tired than expected on your GLP-1 journey? B12 deficiency could be the reason.

GLP-1 medications slow stomach emptying and reduce gastric acid secretion. Both of these changes make it harder for your body to absorb B12 from food. Add in the fact that you are eating fewer B12-rich foods like meat and dairy, and deficiency becomes a real risk.

A study published in Diabetes, Obesity and Metabolism found that long-term semaglutide use was associated with declining B12 levels in a meaningful percentage of users.

B12 supports red blood cell production, nerve health, and DNA synthesis. When levels drop, the result is fatigue, brain fog, and a general sense of being run down.

Ask your doctor to check your B12 levels at your next visit. An oral methylcobalamin supplement is inexpensive and very safe.

GLP-1-related nausea is one of the most common reasons people reduce or stop their medication, especially during dose increases. Ginger has centuries of use as a nausea remedy, and modern clinical research backs it up.

Harvard Health and multiple peer-reviewed studies specifically recommend ginger for GLP-1-related GI side effects. The active compounds called gingerols help speed gastric emptying and act on the gut-brain signaling pathways involved in nausea.

Ginger tea, capsules, or even low-sugar ginger chews all work. This is one of the lowest-cost, highest-impact tools in our community's toolkit.

GLP-1 medications already have proven cardiovascular benefits (the SELECT trial in NEJM 2023 showed a 20% reduction in major cardiovascular events with semaglutide). Omega-3 fish oil amplifies those benefits.

Omega-3 fatty acids can lower triglyceride levels by 20–30%, reduce systemic inflammation, and modestly improve blood pressure. Some research also suggests omega-3s improve insulin sensitivity and support satiety hormones.

Look for a supplement providing at least 1 gram of combined EPA/DHA daily.

Our pick: Thorne Fish Oil — highly purified, third-party tested.

Most people think creatine is only for gym bros. Research tells a completely different story.

Creatine is one of the most studied supplements in sports science, with decades of safety data. For GLP-1 users, its primary benefit is helping muscles maintain size and strength during rapid weight loss by supporting cellular energy systems.

A 2022 study in Medicine & Science in Sports & Exercise found creatine supplementation significantly reduced lean mass loss during caloric restriction. There is also growing evidence that creatine supports cognitive function — useful since rapid weight loss can bring some mental fog.

Just 3–5 grams daily is all you need. It is tasteless, mixes into anything, and costs pennies per serving.

Our pick: Thorne Creatine — ultra-pure creatine monohydrate, no fillers.

Not glamorous. Absolutely essential.

When you are eating 40–60% less food than before, you are also consuming 40–60% fewer micronutrients. A multivitamin is practical insurance against deficiencies that develop quietly over months.

Look for one that covers 100% of daily values for B vitamins, vitamin D, iron, and zinc. Methylated B vitamins are easier to absorb, which matters since GLP-1 medications affect stomach acid production.

Take it with a meal that contains some healthy fat to improve absorption of fat-soluble vitamins A, D, E, and K.

Do not try to add all seven supplements at once. Start with the one that matches your biggest current challenge:

Add one supplement at a time. Give it 2–3 weeks before adding the next. This way you will know what is working.

While you are adjusting to your GLP-1 dose, these are the supplements our community uses most:

Supplements support your journey. A physician-supervised GLP-1 program starts it.

For women: Hers Weight Loss offers GLP-1 prescriptions with physician oversight, starting the same week you apply. → Check your eligibility here.

For men: Hims Weight Loss offers the same — GLP-1 programs designed specifically for men's metabolic health. → See if you qualify.

Prefer transparent flat-rate pricing? Sesame Care Weight Loss offers GLP-1 access with no membership fees — pay only for the visit. → See pricing here.

Recent research suggests that gut bacteria diversity may predict how well GLP-1 medications work for weight loss. People with more diverse microbiomes lost more weight in several key studies.

You can support your gut health by eating fermented foods like yogurt, kimchi, and sauerkraut, along with fiber-rich whole grains and legumes. Combined with a fiber supplement, this could meaningfully improve your results.

Staying hydrated is harder on GLP-1s than most people expect. Reduced appetite, nausea, and simple lack of thirst can all get in the way. Some quick fixes our community swears by:

Adding a pinch of sea salt and lemon to water covers electrolytes without calories. Frozen berries used as ice cubes add subtle flavor as they melt. Warm ginger tea counts toward hydration and doubles as nausea relief. Bone broth is easy on a sensitive stomach and provides electrolytes naturally.

Set a phone reminder every hour for just 3–4 small sips. Consistency beats volume when you are not feeling well.

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