Prenatal vitamins when not pregnant: should you take them?

Prenatal vitamins when not pregnant: should you take them?

If you're not pregnant and wondering whether to take prenatal vitamins, you're in good company. It's one of the most common supplement questions out there, and the answer depends on your goals.

For anyone actively trying to conceive or thinking about it within the next year, the answer is a clear yes. Building up stores of folate, iron, vitamin D, and other key nutrients takes time, and having them on board before pregnancy gives your body the best possible starting conditions.

For people with no pregnancy plans, the picture is more nuanced. Prenatal vitamins can fill legitimate nutritional gaps, particularly if you deal with heavy periods (the iron helps), follow a restricted diet, or have low folate intake. 

RELATED: How to choose a prenatal vitamin 

What's different about prenatal formulas?

Compared to standard multivitamins, prenatals typically contain higher levels of folate (usually 800-1350 mcg versus 400 mcg) and more iron (18 mg versus 8 mg). They may contain less of other nutrients that matter for general health, like calcium, magnesium, or vitamin E. This is a tradeoff worth understanding: you're getting more of what a pregnancy needs and potentially less of what a non-pregnant body prioritizes.

Are there risks?

For most people, taking a prenatal when not pregnant is low-risk. The most common complaints are digestive: the extra iron can cause constipation, nausea, or dark stools. If you're sensitive to iron, look for a prenatal with a gentler form like iron bisglycinate like WeNatal for Her, or one with a lower iron dose.

There's no evidence that prenatal vitamins cause weight gain, hormonal changes, or any serious adverse effects in non-pregnant individuals.

RELATED: Can men take prenatal vitamins? What to know about male prenatal nutrition

A note from WeNatal on if you can take prenatal vitamins without being pregnant?

WeNatal for Her uses gentle iron and methylfolate to minimize common side effects while maximizing absorption. If you're in the preconception window, starting now gives your body time to build the nutrient reserves that matter most in those first weeks. Explore our full prenatal lineup to find the right starting point for your journey.

RELATED: The ultimate preconception guide: What to do when you’re ready to get pregnant 

References

Adams JB, et al. (2022). Evidence based recommendations for an optimal prenatal supplement. Maternal Health, Neonatology and Perinatology, 8:4. DOI: 10.1186/s40748-022-00139-9

Barry MJ, et al. (2023). Folic acid supplementation to prevent neural tube defects: USPSTF reaffirmation recommendation statement. JAMA, 330(5):454-459. DOI: 10.1001/jama.2023.12876