Is Magnesium Citrate Safe During Pregnancy?
Updated September 14, 2026
The Answer
Magnesium citrate is generally compatible with pregnancy when used orally at normal prenatal supplement levels to meet magnesium needs. That reassurance does not automatically extend to high dose supplements or laxative use.
The key distinction is nutritional supplementation versus higher dose laxative use: magnesium containing laxatives can cause diarrhea, nausea, cramping, and toxicity, especially with kidney impairment.
NIH guidance establishes magnesium as a needed pregnancy nutrient while distinguishing dietary intake from supplemental and medication amounts that can cause adverse effects.
Already used it? If you have already taken magnesium citrate, check the amount of magnesium and whether it was a nutritional supplement or laxative. Ask your prenatal clinician to review the exposure if it involved a high dose, you have kidney impairment, or you develop diarrhea, nausea, or cramping.
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What Is Magnesium Citrate?
Magnesium citrate is a form of magnesium used to support magnesium levels and promote bowel regularity. You may encounter it in powders, gummies, liquid supplements, and oral solutions, as well as electrolyte drinks and multivitamins. Magnesium citrate can also serve formulation or conditioning roles in skin, scalp, and hair products.
What Other Ingredients Should You Look Out for in Products With Magnesium Citrate?
A product's full ingredient list determines whether it's pregnancy-safe or not. These ingredients also appear in some of the magnesium citrate products we analyzed and may deserve a closer look.
Elderberry
CautionLook for “elderberry extract” in combination supplements: NCCIH says little is known about its safety for health purposes during pregnancy. Check the extract amount and review the combination with your prenatal clinician, since concentrated extracts warrant extra caution.
Flagged in 1 product (0.6%) in this analysis.
Does the Form or Amount of Magnesium Citrate Matter During Pregnancy?
For oral use, distinguish your total nutritional needs from the supplemental limit. NIH pregnancy recommendations are 350–360 mg of magnesium daily for adults and 400 mg for adolescents; the 350 mg/day upper limit applies only to magnesium from supplements and medications, not food. Clinician directed treatment of low magnesium is a separate medical context. For normal topical cosmetic use on intact skin, reassurance rests on cosmetic safety assessments and low expected systemic exposure, not direct pregnancy studies. Irritation or significantly broken skin can change that exposure.
What Products Contain Magnesium Citrate?
Pregnancy Safe has looked at 1,093 products that have magnesium citrate as an ingredient. The category and grade breakdowns below use 164 products whose names mention Magnesium Citrate or another name for it.
What Types of Products Contain Magnesium Citrate?
Products You May Have That Contain Magnesium Citrate
| Grade | Product | Brand | Type |
|---|---|---|---|
| A | Natural Vitality Calm Magnesium Citrate Powder 20 Oz | Natural Vitality | Dietary Supplement |
| A | Calm Magnesium Citrate Supplement | Natural Vitality | Dietary Supplement |
| B+ | Magnesium Citrate 200 Mg | An Amazing Nutrition Amazing Formulas | Dietary Supplement |
| B+ | Magnesium Citrate Oral Solution 10 Oz | Freskaro | Oral Solution |
| A | Maryruth Organics Calm Magnesium Citrate Gummies | Maryruth Organics | Dietary Supplement |
| A | Natural Calm Magnesium Citrate Powder | Natural Calm | Dietary Supplement |
| A | Spring Valley Magnesium Citrate 100 Mg | Spring Valley | Dietary Supplement |
| A | Reviews Clean Nutraceuticals Primary Supplement Typel-Theanine, Magnesium Glycinate, Magnesium, Magnesium Citrate, Magnesium Taurate | — | Dietary Supplement |
How Do Products Containing Magnesium Citrate Score?
It can be helpful to see how products containing magnesium citrate generally score during pregnancy. This does not tell you whether your exact product is safe, but it gives you a general idea of what we found. In this breakdown of 164 products, 59% receive a B grade. A B grade means the complete formula is likely safe, with minimal identified risk.
Frequently Asked Questions About Magnesium Citrate During Pregnancy
Can I use magnesium citrate for pregnancy constipation?
Magnesium citrate is used to promote bowel regularity, but nutritional dose reassurance does not establish that a laxative dose is appropriate for you. Review the exact product and dose with your prenatal clinician, particularly if you have kidney impairment.
Is 500 mg of magnesium a day within the pregnancy limit?
If 500 mg refers to magnesium from supplements or medications, it exceeds the 350 mg/day supplemental upper limit. That limit does not include magnesium from food and is not a threshold at which harm is certain. Clinician directed treatment needs individual review.
Does magnesium in my prenatal count toward the supplemental limit?
Yes. Magnesium from your prenatal, separate supplements, and magnesium containing medications contributes to the supplemental total. Magnesium naturally present in food does not count toward that 350 mg/day limit.
Why does kidney health matter when taking magnesium citrate?
Kidney impairment increases the concern for magnesium toxicity, especially with high dose oral supplements or magnesium containing laxatives and antacids. Your clinician should review the dose in that medical context.
Is magnesium citrate better than other magnesium forms during pregnancy?
The available evidence does not establish a best magnesium form for pregnancy or pregnancy constipation. Citrate, glycinate, and oxide are different forms, not interchangeable names; the magnesium amount and intended use remain important.
What if magnesium citrate is in a skin or hair product?
Magnesium citrate is considered safe for normal topical cosmetic use based on cosmetic assessments and low expected exposure through intact skin. Direct pregnancy studies are lacking. Use as directed, recognizing that irritation or significantly broken skin can change exposure; this does not establish the safety of the complete formula.
How Do We Score Products for Pregnancy Safety?
We analyze each product's ingredients and category to flag known risks and provide cautionary notices for general category safety concerns.
A - Safe
Excellent choice! All ingredients are considered safe during pregnancy.
What to do: Use with confidence.
B - Likely Safe
Pretty much safe with very minimal risk. Some ingredients may have limited pregnancy studies, but no significant safety concerns have been identified.
What to do: Use with confidence.
C - Limit
Contains ingredients with some pregnancy considerations. Research shows these ingredients may have limited safety data, potential for minor hormonal effects, or require caution based on animal studies.
What to do: Use sparingly and consider safer alternatives when available.
D - Caution
Similar to C grade but contains multiple cautionary ingredients. The combination increases overall concern.
What to do: Try to avoid if that makes you feel better. If you've already used it, no need to panic.
F - Avoid
Contains an ingredient Pregnancy Safe recommends avoiding during pregnancy. This may reflect an established risk or a precaution based on limited evidence; check the ingredient guidance and exposure context.
What to do: Do not use during pregnancy. If you've already used it, don't worry - contact your OBGYN if concerned.
Sources
- https://cir-safety.org/sites/default/files/carbon122016rep.pdf
- https://medlineplus.gov/druginfo/meds/a601072.html
- https://medlineplus.gov/lab-tests/magnesium-blood-test/
- https://ods.od.nih.gov/factsheets/MVMS-HealthProfessional/
- https://ods.od.nih.gov/factsheets/Magnesium-HealthProfessional/
- https://ods.od.nih.gov/factsheets/Pregnancy-HealthProfessional/
- https://ods.od.nih.gov/factsheets/magnesium-healthprofessional/
- https://pmc.ncbi.nlm.nih.gov/articles/PMC6507506/
- https://pubmed.ncbi.nlm.nih.gov/19514931/
- https://pubmed.ncbi.nlm.nih.gov/24861367/
- https://pubmed.ncbi.nlm.nih.gov/27624531/
- https://pubmed.ncbi.nlm.nih.gov/28403154/
- https://pubmed.ncbi.nlm.nih.gov/42372834/
- https://www.acog.org/clinical/clinical-guidance/committee-opinion/articles/2010/03/magnesium-sulfate-before-anticipated-preterm-birth-for-neuroprotection
- https://www.acog.org/womens-health/faqs/healthy-eating-during-pregnancy
- https://www.nccih.nih.gov/health/elderberry
- https://pmc.ncbi.nlm.nih.gov/articles/PMC3941201/
- https://pmc.ncbi.nlm.nih.gov/articles/PMC8026097/
- https://pmc.ncbi.nlm.nih.gov/articles/PMC7961730/
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00000311.htm
- https://www.fda.gov/food/information-consumers-using-dietary-supplements/questions-and-answers-dietary-supplements
- https://pubmed.ncbi.nlm.nih.gov/11518905/
- https://infantrisk.com/content/management-cold-and-flu-during-pregnancy