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The short version
Lose the weight without losing the muscle, the minerals, or your gut.
- Creatine Monohydrate — Lean-mass protection
- Magnesium Glycinate — Mineral + regularity
- Probiotics — Gut recalibration
- Vitamin D3 + K2 — Micronutrient insurance
- Omega-3 (EPA/DHA) — Essential fats
GLP-1 medications like semaglutide (Ozempic, Wegovy) and tirzepatide (Mounjaro, Zepbound) work partly by making you eat dramatically less. That is the point — and also the problem. Eat 40% fewer calories and you get 40% fewer of everything else: protein, magnesium, vitamin D, omega-3s, fiber.
The two well-documented risks worth engineering against: lean-mass loss (a meaningful share of GLP-1 weight loss can be muscle if you do not fight for it) and digestive disruption — slowed gastric emptying, constipation, and a gut microbiome adjusting to a very different food volume.
This stack exists to protect what you want to keep. It assumes you are working with the clinician who prescribed your medication — bring this list to them, especially because slowed gastric emptying can change how things absorb.
How we build this stack
Muscle first: anchor every day at 0.7–1 g protein per pound of goal body weight (shakes count and are often the only realistic way at a suppressed appetite), lift 2–4 times per week, and take creatine 5 g daily. That trio is the difference between fat loss and frailty.
Then cover the shrunken-diet gaps: magnesium glycinate (also eases constipation via the bowel-regularity effect of magnesium), vitamin D3+K2, omega-3, and a quality probiotic while your gut recalibrates. When appetite is gone, a protein shake is usually the only realistic way to hit the daily target — treat it as food, not a supplement.
The stack
| Ingredient | Role | Dose & timing |
|---|---|---|
| Creatine Monohydrate | Lean-mass protection | 5 g daily. Non-negotiable if preserving muscle through rapid loss matters to you. |
| Magnesium Glycinate | Mineral + regularity | 200–400 mg evening. Addresses two GLP-1 complaints at once: sleep and constipation. |
| Probiotics | Gut recalibration | A multi-strain product daily while your digestion adapts to lower food volume. |
| Vitamin D3 + K2 | Micronutrient insurance | 2,000–5,000 IU with your largest meal; fat-soluble vitamins suffer most in tiny diets. |
| Omega-3 (EPA/DHA) | Essential fats | 1–2 g EPA/DHA. Very-low-calorie eating usually means very-low-fat eating. |
What to expect
- Constipation relief from magnesium typically arrives within days; adjust dose to bowel tolerance.
- Muscle preservation is measured in months: strength retention and body composition, not the scale, are the metrics that matter.
- Nausea management is a medication-titration issue for your prescriber — no supplement fixes dosing that is climbing too fast.
Frequently asked questions
What supplements should I take on Ozempic or Wegovy?
The priority order: protein (0.7–1 g per pound of goal weight, usually requiring shakes), creatine 5 g daily to protect lean mass, magnesium glycinate for sleep and constipation, vitamin D3+K2 and omega-3 to cover a shrunken diet, and a probiotic while digestion adapts. Clear all of it with your prescribing clinician.
How do I stop losing muscle on a GLP-1?
Three levers, all required: adequate daily protein, resistance training 2–4x per week, and creatine 5 g daily. Studies of GLP-1 weight loss without these show a substantial fraction of the loss coming from lean mass — that is largely preventable, not inevitable.
Why am I constipated on semaglutide, and what helps?
GLP-1s slow gastric emptying and shrink food (and fiber) volume, which slows everything downstream. Magnesium glycinate at night, adequate fluids, a fiber target of 25 g+, and daily walking handle most cases. Persistent or severe cases go back to your prescriber.
Do supplements absorb differently on GLP-1 medications?
Slowed gastric emptying can change absorption timing for some nutrients and medications. Take fat-soluble vitamins (D3, omega-3, CoQ10) with your largest meal, and ask your pharmacist to review timing against your other prescriptions.
Are there natural GLP-1 supplements that work like Ozempic?
Nothing over the counter comes close to prescription GLP-1s. Berberine, sometimes marketed as "nature's Ozempic," has modest metabolic-health evidence at 1,000–1,500 mg per day, but the comparison oversells it badly. If you are on the real thing, the smart play is the support stack above.
Written for adults aged 18 and over. This content is for education only and is not medical advice. Supplements are not intended to diagnose, treat, cure, or prevent any disease. Talk with your clinician before starting any supplement, especially if you are pregnant, nursing, taking medication, or managing a health condition. Supplements for children are a pediatric clinician's decision — keep all supplements out of reach of children.
Our medical advisor is Dr. Garrett Wdowin, NMD, ABAAHP, FAARM, naturopathic doctor. This page has not been medically reviewed.