What Supplements Should You Take With Mounjaro or Wegovy?

When appetite drops significantly, gaps in vitamins and minerals can open up even for people who normally eat well. A few areas tend to come up repeatedly in the context of GLP-1 medicines:

Protein

Protein is not a supplement in the traditional sense, but many people on Mounjaro or Wegovy find they are eating far less and worry about hitting daily protein needs. Protein powder (whey, casein, or plant-based) can be a practical bridge when appetite is low and solid meals feel difficult. General guidance from nutritional bodies commonly suggests aiming for adequate protein to help preserve lean muscle alongside fat loss, though what "adequate" means for you personally is worth discussing with your healthcare professional.

Vitamin D

Vitamin D deficiency is common in the general population regardless of GLP-1 use. Because lower food intake can reduce dietary sources, it is one of the nutrients most frequently mentioned alongside these medicines. Many people already supplement with vitamin D as a baseline.

B vitamins (including B12)

B12 is found mainly in animal products, so people eating less — or those already low before starting — may find levels worth monitoring. A general B-complex or standalone B12 supplement is widely used, though your prescriber or doctor can check levels if you are concerned.

Magnesium

Magnesium is another mineral that can slip with reduced food volume. It is involved in hundreds of bodily processes, and low intake is relatively common. Some people on GLP-1 medicines report that it helps with muscle cramps or sleep quality, though individual responses vary.

Fibre supplements

Slower gastric emptying — a commonly reported effect of GLP-1 receptor agonists — can contribute to constipation for some people. A fibre supplement such as psyllium husk, taken with plenty of water, is something many people find useful to discuss with their prescriber.

For a closer look at supplements specifically, see our guide to Mounjaro supplements and which vitamins to be cautious about with Mounjaro. If you are thinking through your overall nutritional approach, our full overview of supplements while on Mounjaro covers this in more depth.

Always follow your prescriber or doctor's guidance before adding new supplements, especially if you take other medications — some supplements can interact with medicines or affect absorption.

Keeping track of what you are actually eating — and spotting where nutritional gaps might be appearing — is much easier when you have the data in front of you. 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 logging. When appetite is low and meals are small, this kind of effortless capture makes it far more likely you will actually see whether your protein target is being hit day to day.

You can also set a daily protein target and track it alongside calories, fibre, and water — so rather than guessing whether you are close, you have a running total through the day. The meal plans and recipe library in the app are built around the kinds of protein-forward, gentle-on-the-stomach meals that tend to work well when appetite is reduced.

If you want to understand the broader picture — including how your nutrition connects to your energy and progress — the calorie deficit tracker in GLP Trackr brings food and targets together in one place.

GLP Trackr helps you record what you are eating so you can have a more informed conversation with your prescriber about whether your nutritional needs are being met — it is a tracking tool, not a substitute for their advice. If you have concerns about deficiencies, supplements, or how your diet is affecting how you feel, speak with your healthcare professional.

Ready to see where your protein and nutrition actually stand? Download GLP Trackr on the App Store or Google Play and explore it free for 7 days.