What Nutrient Gaps Should You Watch for on a GLP-1 Medication?

GLP-1 medications change more than your appetite. By suppressing hunger, slowing digestion, and reducing overall food intake, they can quietly affect how well your body absorbs and holds onto key nutrients, most commonly vitamin D, iron, and calcium. Nausea and reduced intake compound the problem for many women. Watching these specific gaps, and supporting digestive comfort along the way, matters as much as tracking the number on the scale.

Why GLP-1 medications change nutrient absorption, not just appetite

Always consult your healthcare provider before starting any new supplement, especially during pregnancy, breastfeeding, or while managing a medical condition.

GLP-1 receptor agonists work by suppressing appetite, delaying gastric emptying, and increasing satiety, which is exactly why they are effective for weight management. But those same mechanisms can predispose users to micronutrient gaps, not only through eating less overall, but through changes in how the digestive system absorbs what you do eat.† A 2026 narrative review in Clinical Obesity covering six studies and more than 480,000 adults found this pattern held across a large, real-world population. Because this data comes from observational studies, causality is not fully established, a limitation the review's own authors note.

The specific gaps researchers are seeing

Vitamin D deficiency was the most common abnormality in that review, affecting 7.5% of users at 6 months and 13.6% at 12 months. Iron depletion was also frequent, with users showing 26 to 30% lower ferritin levels than comparison groups. More than 60% of users in the reviewed studies fell below estimated requirements for both calcium and iron, and average vitamin D intake reached only about 20% of recommendations. The National Institutes of Health's Office of Dietary Supplements notes that vitamin D helps your body absorb calcium and supports muscle, nerve, and immune function, which is part of why a sustained gap matters beyond a single lab value.

Why nausea makes the problem worse, and how it's typically managed

Nausea, vomiting, and reduced intake are common, clinically recognized side effects of GLP-1 therapy, and they tend to compound any existing nutrient gap by further reducing what you are able to eat. An international, multidisciplinary panel of physicians, researchers, and dietitians developed 52 expert consensus recommendations, using a modified Delphi approach, specifically addressing nutritional and lifestyle strategies for managing nausea, vomiting, diarrhea, and constipation during GLP-1-based therapy. Separately, a joint clinical advisory from several major nutrition and obesity medicine societies notes that ginger or peppermint tea can be a beneficial, low-intervention option for managing nausea during GLP-1 therapy, alongside eating smaller meals and staying ahead of dehydration.

Covering nutritional gaps and easing digestive discomfort

This is exactly where real ginger or peppermint and vitamin B6 to ease occasional nausea, morning sickness, and motion sickness earn their place in a daily routine. Our USDA organic lozenges for occasional upset stomach, Nausea Sweets, are formulated with active ginger or peppermint oil plus vitamin B6 to help ease occasional upset stomach, indigestion, and feelings of bloat, in an individually wrapped format you can keep in a bag, car, or desk drawer.† Nausea Sweets are not formulated to treat or prevent any medication's side effects and are best understood as general digestive comfort support.

On the nutrient side, a broad-spectrum daily multivitamin is a reasonable option for any woman managing intake gaps, not only those who are pregnant. Our prenatal with methylated folate and gentle iron, Total Prenatal, is a 22-vitamin and mineral formula that includes vitamin D3, iron bisglycinate, and B12 among its nutrients, and it works as a general daily multivitamin option for women watching their nutrient status closely, whether or not pregnancy is part of the picture.†

What to track if you're on one of these medications

Clinical pharmacist Dr. Jummy Amuwo, Pharm.D., MPH, BCPS, has spoken directly to the caution needed around this space: "there are some positive data coming around GLP-1s and fertility, and it would be nice to get clinical trial data across different populations," she notes, a reminder that research in this area is still developing and individual guidance matters more than general trends.

If you are on a GLP-1 medication, ask your provider about periodic labs for vitamin D, iron or ferritin, and B12, especially past the 6 to 12 month mark, when deficiency rates in the research climbed. Nausea Sweets are USDA Organic and third-party tested in cGMP-certified facilities, and Pink Stork products carry 50,000+ verified Amazon reviews across the brand.

For more on the ingredients behind Nausea Sweets, see our breakdowns of what actually works for nausea, ginger or vitamin B6, and why nausea candies use vitamin B6 and ginger in the first place.

Frequently asked questions

Do GLP-1 medications actually cause nutrient deficiencies?

Research suggests an association between GLP-1 medication use and higher rates of certain nutrient deficiencies, particularly vitamin D and iron, though the studies are largely observational and causality is not fully established.†

Which nutrients are most commonly affected?

Vitamin D and iron show up most consistently in the research, with calcium also frequently below estimated requirements among GLP-1 users studied.

Can Nausea Sweets help with GLP-1-related nausea?

Nausea Sweets are formulated with active ginger or peppermint oil plus vitamin B6 to help ease occasional upset stomach and support digestive comfort generally.† They are not intended to treat medication side effects specifically and do not replace guidance from your provider.

Should I take a prenatal vitamin if I'm not pregnant?

Total Prenatal is formulated as a 22-nutrient multivitamin and can be used as a general daily nutrient option by women who are not pregnant, though it is worth discussing with your provider given the iron and vitamin D content.†

How soon do nutrient gaps typically show up?

In the research reviewed, vitamin D deficiency rates rose from 7.5% at 6 months to 13.6% at 12 months, suggesting the risk builds with duration of use rather than appearing immediately.

What can I do about nausea besides medication adjustments?

A multi-society clinical advisory notes that ginger or peppermint tea, smaller meals, and staying ahead of dehydration are reasonable supportive strategies, alongside anything your provider recommends.

† These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Always consult your healthcare provider before starting any new supplement, especially during pregnancy, breastfeeding, or while managing a medical condition. Keep out of reach of children.