Vitamins to Take on Mounjaro and Wegovy: What Many People Consider

Reduced food intake is one of the most commonly reported effects of Mounjaro and Wegovy. Eating less can make it harder to consistently hit daily targets for certain micronutrients — particularly when meals are smaller and, for some people, less varied. The following are among the nutrients most often mentioned in this context; none of this is personal supplementation advice, and your prescriber or doctor is the right person to assess what you actually need.

Vitamin D

Vitamin D is found in relatively few foods in meaningful amounts, so people with reduced appetites may already be at risk of lower intake. Many healthcare professionals routinely check vitamin D levels and discuss supplementation — it is one of the most commonly recommended vitamins to take while on Mounjaro or Wegovy.

B Vitamins (especially B12)

B vitamins, and vitamin B12 in particular, are found mainly in animal products. If smaller portions mean less meat, fish, eggs, or dairy, B12 intake can fall. People following a predominantly plant-based diet alongside GLP-1 treatment may want to discuss B12 specifically with their prescriber.

Iron

Iron intake can drop when overall food volume decreases. Women in particular are often advised to keep an eye on iron levels. If you notice persistent fatigue, it is worth raising with your healthcare professional rather than self-supplementing, as iron levels should ideally be checked before supplementation begins.

Calcium and Magnesium

Dairy and leafy greens are common sources of both calcium and magnesium — foods that can be eaten in smaller quantities when appetite is reduced. Both play roles in bone health and general wellbeing, and are worth mentioning when discussing micronutrient intake with your prescriber.

Zinc

Zinc supports immune function and is found in meat, shellfish, legumes, and seeds. As with the others, a varied diet is the ideal source, but zinc is another nutrient that can slip when total food intake falls.

It is also worth being aware that some supplements can interact with medications. For a fuller picture of what to avoid or take with care, the page on vitamins that should not be taken with Mounjaro covers this in more detail. You may also find the overview of Mounjaro and vitamins and the broader guide to vitamins when on Mounjaro useful for further reading.

A practical note on diet alongside supplementation: keeping protein intake consistent matters too, since muscle maintenance is a common goal during weight loss on GLP-1 medicines. Thinking about your overall nutrition — not just supplements — is part of the picture, and tracking your calorie intake and deficit can give you a clearer view of where any nutritional gaps might exist.

Keeping track of what you are actually eating — including whether you are consistently hitting protein, calorie, and micronutrient-adjacent targets — is much easier when the logging is effortless. GLP Trackr's AI food photo scan lets you point your camera at a meal and get an instant breakdown of calories, protein, and macros without manual entry. When appetite is low and meals are small, this kind of frictionless logging makes it far more likely you will stick with it.

Beyond food logging, GLP Trackr lets you set daily targets for protein, calories, water, fibre, and steps — so you can see at a glance whether smaller meals are still meeting your goals. If you notice patterns (for example, consistently low protein on certain days), that is useful information to bring to your next appointment with your prescriber or doctor.

GLP Trackr also includes a side-effect and symptom tracker, which can be handy if you want to log things like fatigue or energy levels over time — the kind of detail that can be genuinely helpful when discussing how you are feeling with your healthcare professional. GLP Trackr helps you record and notice these patterns; it is not a substitute for clinical advice.

If you are thinking carefully about what you eat and supplement on your GLP-1 journey, having your nutrition data in one clear place makes those conversations with your prescriber more productive. Try GLP Trackr free for 7 days — available on the App Store and Google Play.