Best Supplements to Take With Ozempic & GLP-1 (2026)

Updated June 2026 · Reviewed by the YourHealthier Science Team

If you are taking a GLP-1 medication like Ozempic, Wegovy, Mounjaro, or Zepbound, the supplements worth considering are the ones that solve a specific problem the medication creates: muscle loss, nutrient gaps from eating less, and side effects like constipation and dehydration. In practice that means prioritizing adequate protein first, then creatine for muscle and strength preservation, magnesium for constipation and sleep, electrolytes for hydration, and filling any tested deficiencies (commonly vitamin D and B12) under a clinician's guidance. You do not need a cabinet full of pills. You need a short, consistent routine that covers the gaps your reduced appetite leaves behind. None of these supplements make the medication work better or replace it; they protect your body while it does its job. Below is what each one does, what the evidence actually shows, how much people typically take, and who should be cautious.

This guide is built around a simple rule we follow across everything we publish: food and your prescriber come first, supplements fill the gaps that remain. We will be direct about which products we make (and have linked) and which we do not, because on a topic this consequential, you deserve to know where the line is.

Why GLP-1 medications create nutrient and muscle gaps

GLP-1 receptor agonists work by slowing digestion and increasing fullness, so you eat less and feel satisfied sooner. That mechanism is the entire point, and it works: roughly 18% of US adults have tried a GLP-1 and about 12% are currently taking one, according to KFF survey data. But the same appetite suppression that drives weight loss has a side effect that gets far less attention than nausea or "Ozempic face."

When daily intake drops to 1,000–1,200 calories, meeting your micronutrient needs through food alone becomes mathematically difficult no matter how clean your diet is. Cut total food volume by 40–50% and you cut the vitamins, minerals, and protein that came with it. A retrospective analysis of 461,382 adults treated with GLP-1 receptor agonists found that nutritional deficiencies were diagnosed in 12.7% of patients within six months and 22.4% within twelve months, with vitamin D deficiency the most common at roughly 13.6% by the one-year mark. Digestive side effects like vomiting or diarrhea can pull magnesium and potassium lower, and there is some evidence these medications can reduce iron levels.

The bigger structural issue is muscle. Any substantial weight loss (on a GLP-1 or not) sheds some lean mass alongside fat. As Dr. Eduardo Grunvald, Medical Director of the University of California San Diego's Center for Advanced Weight Management, has noted, the more total weight you lose, the more muscle mass you tend to lose, though he is clear that the benefits of treating obesity outweigh that risk. Some analyses estimate that 15–40% of the weight lost on GLP-1 drugs can come from lean mass, including muscle. That is why protein intake and resistance training are the two non-negotiables of any GLP-1 routine, and why the smartest supplement choices are the ones that defend muscle and fill the specific holes lower intake leaves behind.

The mechanism behind the nutrient gap is worth understanding because it tells you which supplements actually make sense. GLP-1 receptor agonists reduce energy intake by up to roughly 40%, according to a 2025 review of the evidence, and they do it through three overlapping pathways: appetite suppression, delayed gastric emptying, and altered nutrient absorption. A 2026 narrative review in Clinical Obesity by Urbina and colleagues, which pooled six studies covering 480,825 adults, found that more than 60% of GLP-1 users consumed below estimated requirements for calcium and iron, and that average vitamin D intake landed at just 20% of recommendations (PubMed: 41549912). The same review flagged that protein and calcium insufficiency directly contributed to lean-mass loss, while thiamine and B12 deficits grew over time. Iron depletion was common too, with GLP-1 users showing 26–30% lower ferritin than comparators.

This is the data behind the muscle-and-nutrient concern, drawn from the largest claims analysis to date — Butsch and colleagues' retrospective study of 461,382 US adults newly prescribed GLP-1RAs (Butsch et al., Obesity Pillars, 2025; PMC12205620):

One nuance from that study is genuinely useful for buyers: deficiencies were more likely to be recorded in patients who saw a dietitian, because someone was actively looking for them. The average dietitian visit came about four months after starting therapy. The takeaway is not that dietitians cause deficiencies — it is that gaps are common, often go unnoticed, and that the many people using GLP-1s without supervision may be at higher, undetected risk.

How to think about supplements on a GLP-1 (a simple hierarchy)

Before any product, get the order of operations right. Most people overspend on the wrong things and underinvest in the two that matter most.

1. Protein and resistance training. These protect muscle better than any pill. Everything below is secondary to hitting your protein target and lifting something heavy a few times a week.
2. Address tested deficiencies. Ask your prescriber to check vitamin D, B12, and iron. Supplement what is actually low rather than guessing.
3. Manage side effects you actually have. Constipation, poor sleep, dehydration, nausea — match the supplement to the symptom, not to a generic "GLP-1 stack."
4. Add performance support if you train. This is where creatine earns its place.

With that frame, here is each supplement worth knowing about.

Why muscle preservation matters beyond appearance

It is easy to treat "don't lose muscle" as a vanity concern, but on a GLP-1 it is a health and durability concern, and understanding why makes the protein-and-creatine priority click. Muscle is metabolically active tissue: it is where most of your glucose gets used, so holding onto it supports the blood-sugar benefits many people are on these medications for in the first place. Muscle also drives your resting metabolic rate — lose a meaningful amount of it and you burn fewer calories at rest, which is part of why weight regain after stopping can be so stubborn. And functionally, muscle is what keeps you strong, mobile, and resilient, which matters at every age and increasingly so over time.

There is also a body-recomposition reason that is directly relevant to anyone watching the scale. If a chunk of your weight loss comes from muscle rather than fat, you can hit your goal weight while ending up "skinny-fat" — lighter, but softer and weaker than you wanted. Preserving lean mass is how you make the weight you lose the right weight. This is the logic behind putting protein and resistance training at the top of the hierarchy and using creatine to support the training that protects muscle: you are not just losing weight, you are trying to keep the parts of your body you want to keep. Every supplement decision in this guide flows from that single idea.

Protein: the foundation, not an afterthought

Protein is the most important nutrient on a GLP-1, and it is the one most people fall short on once appetite drops. Protein supplies the amino acids your body uses to build and maintain muscle, and when you pair it with resistance training, it is the single best defense against the lean-mass loss described above. Registered dietitians working with GLP-1 patients consistently flag protein as the first thing to prioritize, precisely because a smaller appetite makes it hard to reach a target through whole food alone.

Most guidance lands somewhere around 0.7–1 gram of protein per pound of goal body weight for people actively losing weight and training, though your prescriber or dietitian should set your number. Whole-food sources (eggs, dairy, fish, poultry, legumes, tofu) come first. Protein powders and shakes are a practical backup when you cannot eat enough volume.

The practical problem on a GLP-1 is mechanical, not motivational: even when you intend to eat protein, early fullness and a slower-emptying stomach can stop you partway through a meal. A few tactics dietitians commonly suggest help here. Eat the protein on your plate first, before carbohydrates or vegetables, so the most important macronutrient gets in before you fill up. Spread protein across several smaller feedings rather than one or two large meals your appetite cannot finish. And lean on easy-to-consume sources (Greek yogurt, cottage cheese, a shake) on days when solid food is unappealing. These are not supplement strategies; they are the difference between a routine that protects muscle and one that does not.

A note on transparency: YourHealthier does not currently sell a protein powder, so there is nothing for us to link here. We are including protein anyway because leaving it out would make this guide dishonest. If you take one thing from this article, make it protein.

Creatine: the most evidence-backed pick for protecting muscle and strength

If protein and lifting are the foundation, creatine is the most useful supplement to build on top of them. Creatine monohydrate is one of the most studied supplements in existence, with a strong safety and efficacy record across hundreds of trials. It works by helping your muscles rapidly regenerate ATP, the energy currency for short, intense effort, which supports strength and training output, and training output is exactly what preserves muscle during weight loss.

This matters more on a GLP-1, not less. When you are eating in a calorie deficit and at risk of losing lean mass, anything that helps you train effectively and hold onto strength is working in the same direction as your protein intake. Major health publications now routinely list creatine alongside protein and HMB as a reasonable add-on for people on GLP-1 medications who want to preserve muscle. Creatine also draws water into the muscle, which can mean a small, harmless scale increase early on — worth knowing so you do not misread it as fat gain while you are tracking weight loss.

The typical approach is 3–5 grams of creatine monohydrate per day, taken consistently; timing matters far less than daily consistency. You can skip any "loading phase." For anyone on a GLP-1 who is also doing resistance training, creatine is the clearest evidence-backed value on this list.

Here is how the muscle-preservation options compare for someone on a GLP-1:

Option	Primary role	Evidence strength	Typical amount
Protein	Supplies amino acids to build/maintain muscle	Foundational — strongest priority	~0.7–1 g per lb goal weight (set by clinician)
Creatine monohydrate	Supports strength & training output that preserves muscle	Strong — hundreds of trials	3–5 g daily, consistent
Resistance training	The stimulus that tells the body to keep muscle	Foundational, not optional	2–3+ sessions/week

From YourHealthier: our Creatine Hydration Powder pairs creatine monohydrate with a hydration base, which is convenient on a GLP-1 because hydration is its own challenge when you are drinking and eating less (more on that below). For the mechanism, dosing, and timing in depth, see our guides on when to take creatine, creatine HCl vs monohydrate, and whether creatine causes weight gain.

Magnesium: for constipation, sleep, and what the side effects deplete

Magnesium is one of the most practical supplements on a GLP-1 because it targets two of the most common complaints at once: constipation and disrupted sleep. Magnesium plays a role in normal muscle and nerve function, blood sugar regulation, and hundreds of other processes, and GLP-1 side effects such as vomiting or diarrhea can pull magnesium levels lower. Several dietitian-authored GLP-1 guides name magnesium as a core supplement to consider, alongside a multivitamin, protein, electrolytes, and vitamin D.

The form matters. Magnesium glycinate is well tolerated and tends not to cause the urgent, loosening effect that magnesium citrate or oxide can (which is useful if your goal is gentle regularity and better sleep rather than a strong laxative effect. If constipation is your primary issue, your clinician may steer you toward a different form or toward fiber first; if sleep and calm are the goal, glycinate is the form most people reach for.

From YourHealthier: our Magnesium Glycinate is formulated for tolerability and evening use. For specifics, see the best time to take magnesium glycinate, whether to take it with food, and magnesium glycinate dosage by goal. One caution specific to GLP-1 users: if you are already managing diarrhea as a side effect, talk to your prescriber before adding magnesium, since some forms can worsen it.

Why form choice matters here more than usual: on a GLP-1 your gut is already running slower and more sensitive, so the "which magnesium" question is not academic. Magnesium citrate and oxide draw water into the bowel, which is why they are used as laxatives — helpful if constipation is severe and your clinician suggests it, unhelpful if you are prone to the nausea or loose stools GLP-1s can cause. Magnesium glycinate, bound to the amino acid glycine, is absorbed well and tends to be gentle on digestion, which is why it is the common choice when the goal is sleep, calm, and steady regularity rather than a strong flush. Glycine itself has a mild calming quality, which is part of why this form is associated with better sleep.

Electrolytes and hydration: easy to overlook, easy to fix

When you eat and drink less, you also take in fewer electrolytes — sodium, potassium, magnesium, and dehydration becomes surprisingly common on GLP-1 medications, especially if you have any vomiting or diarrhea. Fatigue, headaches, dizziness, and muscle cramps are often hydration and electrolyte issues in disguise. Dietitian guidance for GLP-1 users frequently lists electrolytes among the foundational supports for exactly this reason.

For most people the fix is simple: drink water deliberately throughout the day, and consider an electrolyte source if your intake is low or your side effects are pulling fluids out. For a deeper breakdown of how to choose one, see our guide to the best electrolyte powders. You do not need anything exotic; the goal is consistent fluid plus the minerals that go with it.

Transparency note: YourHealthier does not sell a standalone electrolyte powder, so there is nothing to link here. Our Creatine Hydration Powder includes a hydration base, but if you want a dedicated high-sodium electrolyte product, that is a separate category and we will not pretend otherwise.

Vitamin D, B12, and iron: supplement what is actually low

This is the category where testing beats guessing. Because GLP-1 medications reduce how much you eat, they can lower intake of vitamins A, B12, D, and E, especially in people already at risk due to obesity or type 2 diabetes. Vitamin D deficiency is the most commonly diagnosed gap in GLP-1 users, and low iron is a frequent finding as well. B12 absorption also gets harder with age, independent of any medication.

The smart move is to ask your prescriber to check your vitamin D, B12, and iron levels, then supplement the ones that come back low at a dose they recommend. Fat-soluble vitamins like A, D, and E can build up to harmful levels if you take too much, so this is not a category to self-prescribe aggressively. A basic multivitamin is a reasonable floor for many people on reduced intake, but it is not a substitute for correcting a confirmed deficiency.

Iron deserves a specific mention because the signal is consistent across studies. The 2026 Clinical Obesity review found GLP-1 users running 26–30% lower ferritin than comparison groups, and a separate analysis of 18,746 adults with type 2 diabetes found GLP-1 users had a 54% higher likelihood of lower ferritin than users of a different diabetes drug class. A small prospective pilot even showed markedly reduced intestinal iron absorption after ten weeks of semaglutide. If you feel unusually fatigued, breathless, or run-down beyond what reduced calories would explain, low iron is worth ruling out with your clinician rather than self-treating, since too much iron carries its own risks.

We do not sell these single-nutrient products, so there is nothing to link. This section is here because it is genuinely one of the most important parts of GLP-1 nutrition.

Fiber and probiotics: for digestion and regularity

Constipation is one of the most common GLP-1 complaints, and the first-line approach is usually diet and fluids before any supplement. Fiber (from food where possible, or a supplement like psyllium) supports regularity, and probiotics may help with bloating and general digestive comfort, though evidence for constipation specifically is mixed. ConsumerLab's review of supplements for GLP-1 users discusses fiber, probiotics, and protein among the options that may help, alongside vitamins and minerals to monitor.

If digestion is your main issue, layering adequate fiber and fluids first, then considering a probiotic, is a sensible sequence. As with everything here, raise it with your prescriber if symptoms are persistent.

Functional mushrooms: for energy and focus when you are eating less

This one is a softer, optional addition rather than a core GLP-1 supplement, and we want to be clear about that framing. Lower food intake often means lower energy and more "foggy" days, particularly in the first weeks of treatment. Functional mushrooms such as lion's mane and a broad mushroom complex are used for cognitive support and steady energy without the spike-and-crash of high caffeine, which can be appealing when your stomach is sensitive and large meals are off the table.

To be precise about the evidence: these are wellness-supportive ingredients, not treatments for anything GLP-1-related, and they will not preserve muscle or fix a nutrient gap. They sit in the "quality of daily life" tier, not the "structural priority" tier. If you are looking for a gentle daily energy and focus support while your appetite is suppressed, they are a reasonable option.

From YourHealthier: our 10-Mushroom Complex Gummies are an easy, low-volume way to take a broad mushroom blend on days when food feels like a chore. To understand what the research does and does not support, see adaptogenic mushrooms ranked by evidence and lion's mane benefits.

Supplements to be cautious with on a GLP-1

Not everything in the supplement aisle is a good idea on these medications, and a few warrant real caution:

• "Nature's Ozempic" weight-loss supplements. Products marketed as natural GLP-1 boosters do not contain GLP-1 or a GLP-1 agonist, and physicians are openly skeptical that they replicate the medication's effects. Stacking an unproven weight-loss supplement on top of an actual GLP-1 adds cost and risk without clear benefit. Avoid weight-loss supplements without medical advice.
• High-dose calcium without guidance. Calcium matters for bone health during weight loss, but taking it without advice can do more harm than good; get it from food and supplement only if directed.
• Anything that worsens a side effect you already have. Certain magnesium forms can loosen stools — unhelpful if you are already managing diarrhea. Match the supplement to your actual symptoms.
• Fat-soluble vitamins in large doses. A, D, and E can accumulate to harmful levels. Supplement to correct a tested deficiency, not "just in case."

Do supplement needs differ across Ozempic, Wegovy, Mounjaro, and Zepbound?

The medications differ in potency and in how they are dosed, and that affects how aggressively appetite drops, which in turn affects nutrient risk. Semaglutide (Ozempic, Wegovy, Rybelsus) and tirzepatide (Mounjaro, Zepbound) are the most potent and produce the largest appetite reduction and weight loss; liraglutide (Saxenda, Victoza) is older and generally milder. As a rough rule, the more weight you are losing and the faster, the more attention muscle preservation and nutrient gaps deserve — Dr. Grunvald's point that more total loss means more muscle loss applies directly here.

The practical implication: the supplement priorities in this guide do not change by brand, but their urgency scales with how much your intake has dropped. Someone on a high dose of tirzepatide eating substantially less should be more deliberate about protein, creatine, and tested deficiencies than someone on a low starting dose with only modest appetite change. The category of medication matters less than your actual food intake and rate of loss, which is what you and your clinician should be watching.

What changes over time: the first weeks versus the long haul

Your needs are not static across a course of GLP-1 treatment, and matching supplements to the phase you are in beats following a fixed stack.

The first 4–8 weeks are typically when side effects peak — nausea, constipation, low energy, and the steepest drop in appetite as your dose escalates. This is the window where hydration and electrolytes, gentle magnesium for regularity and sleep, and easy-to-consume protein matter most, because eating is hardest. Functional mushrooms for steady energy can fit here too, on the foggy low-appetite days.

From a few months onward, as your body adjusts and your dose stabilizes, the emphasis shifts toward the slow-building risks: cumulative nutrient deficiencies and lean-mass loss. This is when tested-deficiency correction (vitamin D, B12, iron), consistent protein, creatine, and regular resistance training do their most important work. The Butsch data showed deficiencies roughly doubling between the 6- and 12-month marks. Women in perimenopause face overlapping muscle and bone risks — see our menopause supplement guide for that angle, which is exactly the trajectory consistent supplementation and monitoring are meant to interrupt.

If and when you taper or stop, the nutrition habits you built become more important, not less, for protecting the muscle and results you worked for. The same protein-first, train-consistently foundation carries over.

Quick reference: GLP-1 side effect → what to try

Side effect	First-line (food/habit)	Supplement to consider	Watch out for
Constipation	Water, fiber-rich food, movement	Magnesium glycinate/citrate; psyllium fiber	Mag citrate can worsen diarrhea
Nausea	Small meals, ginger tea, bland food	Ginger extract; B6 (ask clinician)	Avoid large supplement doses on empty stomach
Dehydration / cramps	Deliberate water intake	Electrolytes (sodium, potassium, magnesium)	Match sodium dose to actual sweat/loss
Poor sleep	Routine, screen-free wind-down	Magnesium glycinate (evening)	Melatonin interactions; ask prescriber
Muscle loss	1.2–1.6 g protein/kg + resistance training	Creatine monohydrate 3–5 g/day	Protein shake if intake too low; food first
Low energy / brain fog	Sleep, adequate calories, movement	B12 + iron (if tested low); functional mushrooms	Iron only if deficient; excess harms
Hair thinning	Adequate protein and calories	Iron, zinc, biotin (if deficient)	Usually resolves as intake stabilizes

Watch: a physician's breakdown of GLP-1 companion supplements

Dr. Olivia breaks down the ten supplements worth considering while on Wegovy, Ozempic, Mounjaro, or Zepbound — covering protein, creatine, magnesium, electrolytes, vitamin D, B12, and more. Worth watching if you prefer hearing a physician walk through the rationale rather than reading it.

A simple GLP-1 supplement routine to discuss with your prescriber

Pulling it together, a sensible, non-overwhelming starting point looks like this, and every item should be cleared with your clinician, especially if you take other medications:

• Daily, foundational: hit your protein target (food first, shake as backup); deliberate hydration; a basic multivitamin if your intake is low.
• If you train: 3–5 g creatine monohydrate daily.
• For side effects you have: magnesium (glycinate for sleep/gentle regularity) for constipation and sleep; fiber and fluids for digestion; electrolytes if hydration or cramping is an issue.
• Correct what is low: vitamin D, B12, or iron based on testing, at your prescriber's recommended dose.
• Optional quality-of-life: functional mushrooms for steady energy and focus on low-appetite days.

The GLP-1 supplement market is crowded — how to avoid wasting money

Demand has pulled a flood of products into this space, and not all of them deserve your money. The GLP-1 companion-supplement market was valued at roughly $735 million in the US in 2025 and is projected to keep growing at a double-digit annual rate through the early 2030s. Where there is that much money and that much consumer anxiety, marketing tends to outrun evidence. A few filters help you spend well.

Separate "companion" products from "replacement" products. The supplements in this guide help your body while the medication works. A different category — pills sold as "nature's Ozempic" that claim to boost your own GLP-1 — is making a much bigger promise. Physicians including gastroenterologists have been blunt that these products do not contain GLP-1 or a GLP-1 agonist and are unlikely to reproduce the drug's effect. Stacking one on top of an actual prescription adds cost and risk, not results.

Be skeptical of "GLP-1 bundle" mega-stacks. Some brands package a dozen ingredients as a single premium "GLP-1 support" kit. You rarely need all of it, and you cannot tell which component is doing anything. A short, targeted routine built around your actual symptoms and tested deficiencies almost always beats an expensive everything-bundle.

Prioritize third-party testing and clear labels. For anything you do buy (protein, creatine, magnesium, a multivitamin) look for products that disclose their ingredients transparently and ideally carry third-party testing for purity and potency. This matters more during weight loss, when you are relying on a smaller amount of food and supplements to cover your needs.

Match the spend to the priority. If your budget is limited, put it where the evidence is: enough protein, and the one or two supplements that address your real issues (creatine if you train, magnesium if you are constipated or sleeping poorly, correcting a tested deficiency). Skip the rest until a specific need shows up.

Why YourHealthier

We built this guide the way we wish more supplement brands would: by telling you where our products fit and, just as clearly, where they do not. On a GLP-1, the two things that matter most (protein and tested-deficiency correction) are not products we sell, and we said so plainly rather than steering you toward what is in our catalog. Where we do have a genuinely useful, evidence-backed option, like creatine for muscle preservation or magnesium glycinate for sleep and regularity, we have linked it and pointed you to the deeper research behind it. Our standard is simple: earn trust by being accurate first and commercial second.

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