Vitamins and Supplements to Consider on a GLP-1 Medication

Direct Answer

Because GLP-1 medications significantly reduce how much you eat, certain nutrients commonly become harder to get enough of without deliberate attention. The nutrients most frequently flagged in GLP-1 nutrition guidance are calcium, vitamin D, and magnesium, particularly relevant to bone health, along with B12 and iron for people at higher baseline risk of those specific deficiencies.

Why This Happens

Eating less naturally means consuming less of everything, including micronutrients, not just calories. This isn't unique to GLP-1 medications, it's true of any significant reduction in food intake, but the scale of appetite suppression on these medications makes it a more pressing consideration than with typical dieting.

Nutrients Worth Particular Attention

Calcium, vitamin D, and magnesium support bone health, worth prioritizing given the bone density changes discussed elsewhere in this library. B12 is particularly relevant for anyone eating less meat or following a vegetarian or vegan pattern. Iron is worth monitoring, particularly for menstruating women, ideally with a ferritin level check before starting supplementation rather than guessing.

A Basic Starting Point

A general multivitamin is commonly suggested as a reasonable baseline insurance policy when overall food intake is reduced. This isn't a substitute for addressing protein, fiber, and hydration through actual food, covered in depth elsewhere in this library, but it can help fill genuine gaps.

Talk to Your Provider Before Starting Anything New

Discuss any supplement plan with your prescribing provider, particularly if you take other medications or have an existing health condition, since some supplements can interact with medications or aren't appropriate for everyone.

References

• UC Davis Health: GLP-1 and Health, Beyond Weight Loss in the Ozempic Era
• Bartley Weight Loss: GLP-1 Eating Plan, 2026 Nutrition Guide

Related Resources

• Protein
• Muscle Loss on GLP-1 Medications

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• Should I Exercise While on a GLP-1 Medication?
• Hair Loss on GLP-1 Medications

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