Supplements to Take With Ozempic: The 5 That Matter

If you are looking for supplements to take with Ozempic, five stand out: a comprehensive multivitamin, magnesium glycinate, creatine monohydrate, omega-3 fatty acids, and electrolytes. Each one addresses a specific gap that tends to open up when semaglutide reduces your appetite and you simply eat less food than you used to.

To be clear about what supplements can and cannot do: none of these cause weight loss. The weight loss comes from your medication combined with the changes you make to diet and exercise. What supplements can do is help fill nutritional gaps and support the systems in your body that work harder during a period of rapid change — your muscles, your energy metabolism, your digestion.

This guide walks through the five that matter, explains the why behind each one, covers what supplements not to take with semaglutide, and answers the B12 question that comes up constantly with compounded semaglutide. As always, run your full supplement list by your prescriber or pharmacist before you start.

Why eating less creates nutrient gaps

Ozempic and Wegovy (both brand names for semaglutide) work in part by slowing digestion and quieting appetite signals. Many people on these medications eat substantially less than they used to — often noticeably less at every meal. That is exactly what makes the medication effective — but every meal you skip is also a missed delivery of vitamins, minerals, protein, and fluid.

When your plate shrinks, your intake of iron, B vitamins, zinc, magnesium, and omega-3s tends to shrink with it, even when your food choices are good. Supplements exist to backfill that gap, not to replace food.

The 5 best supplements to take with Ozempic

1. A comprehensive multivitamin (with B12, folate, and zinc)

A quality multivitamin is the foundation, because it covers the widest set of gaps with a single daily habit. Look for a comprehensive multivitamin with B12, folate, and zinc — and iron only if your provider confirms it is appropriate for you, since iron should be matched to lab work rather than taken by default. B12 and folate support normal energy metabolism and red blood cell formation, zinc supports immune function, skin, and hair, and iron plays a role in oxygen transport and can run low when you eat less red meat and fewer fortified foods.

These are the ozempic vitamins people most often ask about for a reason. Fatigue and hair shedding are two of the most common complaints during rapid weight loss, and low intake of B vitamins, iron, and zinc can contribute to both. A multivitamin helps make sure a simple nutrient shortfall is not part of the picture. If shedding is a concern for you, our guide to GLP-1 hair loss explains what is actually happening and why it usually resolves.

2. Magnesium glycinate

Magnesium supports normal muscle and nerve function, and it plays a role in hundreds of enzymatic reactions, including those involved in sleep regulation. Intake often drops on a GLP-1 medication because the best food sources — leafy greens, nuts, legumes, whole grains — are exactly the foods that get crowded off a smaller plate.

The glycinate form matters here. Magnesium oxide and citrate are cheaper, but they are more likely to loosen stools, which is unwelcome on a medication already changing your digestion. Magnesium glycinate is generally gentler on sensitive stomachs and is well absorbed, which is why it is the form we stock. Many people take it in the evening as part of a wind-down routine.

3. Creatine monohydrate

Creatine is the most-studied sports supplement in existence, and it earns its place here for one reason: muscle. When you lose weight quickly, a meaningful portion of what you lose can be lean mass unless you actively defend it with protein, resistance training, and supportive nutrition. Creatine monohydrate supports muscle strength and performance during training, which helps you keep the muscle you have while the scale moves.

Can you take creatine while on Ozempic? For most healthy adults, yes — there is no known interaction between creatine and Ozempic. The practical notes are simple: stick to plain creatine monohydrate at the standard 3 to 5 grams daily, drink plenty of water because creatine draws water into muscle tissue and semaglutide already blunts thirst cues, and confirm with your provider first, especially if you have any history of kidney concerns. For the full picture on protecting lean mass, see our article on muscle loss during GLP-1 treatment.

4. Omega-3 fatty acids

Omega-3s (EPA and DHA) support cardiovascular health, joint comfort, and skin — and they are among the first nutrients to fall away when appetite drops, because most people were barely eating enough fatty fish to begin with. Two servings of salmon or sardines a week is the usual benchmark; on a suppressed appetite, most people fall well short.

A fish oil or algae-based supplement fills the gap, and taking it with your largest meal tends to improve tolerance. Skin dryness is a frequent companion of rapid weight loss, and omega-3s are one of the nutrients that support skin barrier function from the inside.

5. Electrolytes

Semaglutide quiets hunger, and for many people it quiets thirst right along with it. Add slower digestion and occasional nausea or vomiting, and it becomes surprisingly easy to run low on fluid, sodium, potassium, and magnesium. Headaches, lightheadedness, and fatigue in the first months on Ozempic are often at least partly a hydration story.

A low-sugar or sugar-free electrolyte mix gives you a reason to drink and replaces the minerals that plain water does not. This is the simplest, cheapest item on the list, and for people struggling with early GLP-1 fatigue, it is often the one that helps them feel noticeably better fastest.

What supplements NOT to take with semaglutide

Here is the honest answer: there is no vitamin that is universally forbidden with semaglutide. What actually deserves caution falls into three categories.

• Stimulant-heavy "fat burner" blends. These products promise to accelerate weight loss, and they are the clearest skip on the list. High doses of caffeine and other stimulants can worsen nausea and disrupt sleep. The medication is doing the appetite work; a stimulant blend adds risk without adding benefit.
• Mega-dose biotin right before lab work. High-dose biotin can interfere with thyroid and hormone lab tests, producing falsely high or low results. If you take a hair-and-nails product with a large biotin dose, pause it 2 to 3 days before any blood draw and tell your provider you take it. Our guide to lab tests on GLP-1 medications covers this in more detail.
• Timing conflicts, not ingredient conflicts. Iron should be taken at least 4 hours apart from thyroid medication such as levothyroxine, because it can reduce absorption. Bulk fiber supplements should be taken 1 to 2 hours away from all oral medications for the same reason.

The overarching rule: bring your complete supplement list — including gummies and drink mixes — to your pharmacist. A five-minute conversation catches nearly every real interaction.

Semaglutide and B12: what the "dosage chart" searches get wrong

Many compounded semaglutide formulations include vitamin B12 in the same vial, which leads people to assume B12 is part of how the medication works. It is not. B12 does not drive weight loss, and no reputable provider claims it does. Compounders include it for practical reasons: it is inexpensive, water-soluble, and supports normal energy metabolism at a time when dietary B12 intake often falls.

If you searched for a semaglutide + B12 dosage chart, here is the honest guidance. The chart for your compounded formulation must come from your compounding pharmacy or prescriber, because compounded products vary in concentration and there is no universal chart that applies across pharmacies. What we can offer is general education about over-the-counter B12: the two common forms are cyanocobalamin (inexpensive, stable) and methylcobalamin (the pre-converted active form), and typical supplemental amounts on product labels range from about 100 mcg to 1,000 mcg daily. Your own target should still be a conversation with your provider, ideally informed by lab work.

Frequently Asked Questions

What are the best vitamins to take while on semaglutide?

The vitamins to take while on Ozempic or any semaglutide product are the ones most likely to run low when you eat less: a comprehensive multivitamin with B12, folate, and zinc — and iron only if your provider confirms it is appropriate for you, since iron should be matched to lab work rather than taken by default — plus vitamin D. Beyond vitamins, magnesium glycinate, omega-3s, creatine, and electrolytes round out the core five. Confirm the list with your prescriber, especially if you take other medications.

What supplements should you not take with semaglutide?

No vitamin is strictly forbidden, but skip stimulant-heavy fat burner blends, which add side-effect risk without benefit. Watch timing: iron at least 4 hours from thyroid medication, fiber supplements 1 to 2 hours from all medications, and pause high-dose biotin 2 to 3 days before lab work. Have your pharmacist review everything you take.

Can you take creatine while on Ozempic?

For most healthy adults, yes — creatine and Ozempic have no known interaction. Use plain creatine monohydrate at 3 to 5 grams daily and be deliberate about hydration, since semaglutide can blunt thirst cues. Check with your provider first if you have kidney concerns or take medications that affect the kidneys.

Is there a semaglutide + B12 dosage chart I should follow?

Not a universal one. Compounded semaglutide products vary by pharmacy, so the only accurate dosage chart for your formulation is the one your compounding pharmacy or prescriber gives you. For over-the-counter B12 taken separately, labels commonly range from 100 to 1,000 mcg daily — ask your provider what makes sense for you.

Do I actually need supplements to take while on Ozempic?

Not everyone does, and supplements are never a substitute for the best diet you can manage. But because semaglutide meaningfully reduces food intake, many people develop gaps in B vitamins, iron, magnesium, and omega-3s over months of treatment. A foundation of a multivitamin plus targeted support is a reasonable insurance policy — reviewed with your provider and ideally checked against lab work.

The bottom line

The best ozempic supplements are unglamorous: a solid multivitamin, magnesium glycinate, creatine monohydrate, omega-3s, and electrolytes. They do not replace the medication or your effort — they support the body doing the work. Start with the foundation, add based on your specific symptoms, and keep your prescriber in the loop.

If you want a starting point matched to your situation, take the quiz and we will point you to the right place — for most people beginning semaglutide, that is the Foundation Bundle. Every ingredient we recommend is browsable on our resources page and available through our Vitaboom dispensary, so you can see exactly what each product contains before you decide.

These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure, or prevent any disease. Always consult your healthcare provider before starting any new supplement, especially while taking prescription medication.