Written by Golp Editorial Team·Sourced from FDA, USDA, NIH, and peer-reviewed US research·Updated August 2026·1 min read
Short answer
Not automatically, but many people on a GLP-1 medication do fall short on specific nutrients simply because they're eating less overall. A joint US clinical advisory recommends addressing nutrient gaps directly rather than assuming a normal diet still covers everything. A healthcare provider or dietitian can tell you which gaps, if any, apply to you.
Why it matters
Eating less is often the point of a GLP-1 medication, but it comes with a side effect that's easy to miss: less food means fewer nutrients, not just calories. A US joint clinical advisory specifically addresses this, recommending nutrition planning as part of GLP-1 treatment, not an afterthought to it.
What the evidence says
The joint advisory published in the American Journal of Clinical Nutrition identifies preventing nutrient deficiencies as a clinical priority during GLP-1 therapy, alongside managing digestive side effects and preserving muscle mass. Separately, the Academy of Nutrition and Dietetics' position, referenced in research hosted by the National Library of Medicine, is that food should be the primary source of nutrients, with supplements playing a role in closing specific, real gaps, not as a blanket recommendation for everyone.
The golp take
You don't need a cabinet full of supplements to be on a GLP-1 responsibly. You need to know which one or two things your specific diet is actually missing.
What to do
Notice which food groups you're eating less of, that's usually where the gap is
Ask your healthcare provider or dietitian whether bloodwork or a nutrition check-in makes sense for you
Prioritize food first, per Academy of Nutrition and Dietetics guidance, and use supplements to close specific gaps
Revisit this periodically, appetite on a GLP-1 often keeps changing
Mozaffarian D, Agarwal M, Aggarwal M, et al. Nutritional priorities to support GLP-1 therapy for obesity: a joint Advisory from ACLM, ASN, OMA, and TOS. Am J Clin Nutr. 2025;122(2):344-367.
Dickinson A, Bonci L, Boyon N, Franco JC. Dietitians use and recommend dietary supplements: report of a survey. Nutr J. 2012;11:14.
FAQs
Does everyone on a GLP-1 need supplements?
No. A US joint clinical advisory recommends assessing individual nutrient gaps rather than assuming supplementation is universally necessary.
What's the first thing to check?
The advisory and Academy of Nutrition and Dietetics guidance both point to food first, looking at what food groups you're eating less of.
Should I ask my doctor before starting a supplement?
Yes, especially on medication. This article is educational, not a substitute for individual medical advice.
