Maca during pregnancy: what the science says about safety

If you're pregnant and considering maca, the honest answer is that it's probably not necessary and its safety is not established. Maca is a Peruvian root traditionally used for energy and hormonal balance, but during pregnancy the evidence is so scarce that we cannot say it's safe—nor that it's dangerous. We simply don't know. And when we don't know, the prudent recommendation is to avoid it, unless your doctor or pharmacist advises otherwise.

What we know about maca and pregnancy

There are few human studies on maca during pregnancy. Most research focuses on non-pregnant adults, and data on pregnant women are virtually non-existent. That doesn't prove maca is harmful, but it means there's no scientific basis to recommend its use. European authorities don't have a specific position on maca in pregnancy, which reflects the lack of evidence, not approval.

Some animal studies suggest maca may have effects on fertility and the reproductive system, but those results don't translate directly into safety for a human fetus. What's true for a rat isn't automatically true for you.

Additionally, maca contains bioactive compounds, such as glucosinolates, which may have hormonal effects. During pregnancy, your body is already undergoing a hormonal revolution—adding a supplement with possible hormonal activity is a risk not worth taking without need.

What 'too much' means in pregnancy

Outside pregnancy, maca is generally well tolerated at normal doses, but there is no official recommended daily allowance. Most studies use between 1.5 and 3 grams per day, and some go up to 5 grams. But 'tolerable' is not the same as 'safe' for a fetus. There is no established maximum level for pregnant women, because it simply hasn't been studied.

If you're taking maca and become pregnant, don't panic. The likelihood of a normal dose causing harm is low, but you should stop and inform your doctor. What matters is what you do from the moment you know.

And don't confuse 'dangerous dose' with 'dose that causes side effects'. A high dose might cause headaches, insomnia, or stomach upset, but that's not the same as a risk to your baby. The problem is that without studies, we don't know where the real danger limit lies.

Common side effects and what to do

In non-pregnant adults, maca is generally well tolerated, but some people experience mild effects: headaches, digestive issues, or sleep changes. If you take maca and feel any of these, the answer is to stop and see if they pass. They usually disappear within a few days.

In pregnancy, your body is already working differently. Digestion is slower, hormones are shifting, and a supplement that previously caused no problem might now bother you. If you feel any discomfort, stop and talk to your doctor.

Who should not take maca without speaking to a professional first

Besides pregnant women, other groups should avoid maca without medical guidance:

• Women with a history of hormone-sensitive cancers, such as breast or ovarian cancer.
• People with thyroid disease, because maca contains goitrogens, which may interfere with thyroid function.
• People with high or low blood pressure, because maca may affect blood pressure.
• Those taking hormonal medications, such as contraceptives or hormone replacement therapy.

If you're breastfeeding, the same logic applies: there is no data on the passage of maca compounds into breast milk, nor on effects on the baby. Absence of evidence is not evidence of safety.

Interactions worth knowing about

Maca may interact with thyroid medications, because it can affect thyroid hormone production. It may also have a slight effect on blood pressure, which could be relevant if you take blood pressure medication. And, as it can influence hormones, it may interfere with hormonal therapies.

In pregnancy, it's common to take iron and folic acid supplements. There are no known interactions between maca and these nutrients, but that doesn't mean they don't exist—it means they haven't been studied.

If you take any medication regularly, the rule is simple: ask your pharmacist or doctor before adding any supplement, including maca.

Signs to stop and talk to a professional

Some symptoms warrant an immediate call to your doctor, and they are not the same as the mild effects described above. If you're taking maca and experience:

• Palpitations or irregular heartbeat
• Severe, persistent headaches
• Nausea or vomiting that won't stop
• Sudden changes in blood pressure
• Any bleeding or cramping

Stop the maca and contact your doctor. These symptoms may not be related to maca, but it's better to check.

In pregnancy, any new symptom should be reported to your doctor, even if it seems benign. Your body is going through many changes, and it's hard to know what's normal.

What changes with gummies

If you're considering maca in gummy form, there are a few particularities. Gummies contain sugar or sweeteners, which may be relevant if you have gestational diabetes or are watching your weight. Some gummies contain gelatine, which could be a problem if you're vegetarian or vegan—but not all use gelatine, so check the label.

Gummies may also contain other ingredients, such as vitamins or plant extracts, which may not be suitable in pregnancy. Always read the label and confirm with your pharmacist that all ingredients are safe for you.

And an important point: keep gummies out of reach of children. They look like sweets, and a child could eat several without realising the danger. If that happens, don't wait and see: contact your doctor, pharmacist, or your country's poison information centre. Store them in a high cupboard, preferably with a child-resistant lock.

What is not known—and why it matters

The truth is that there are no quality clinical studies on maca in pregnancy or breastfeeding. We don't know if it affects fetal development, whether it passes into breast milk, or if it has any long-term effects on the baby. The evidence is weak, and that's not a detail—it's the central point.

Safety recommendations in pregnancy are based on the precautionary principle: if there's no data, assume it's not safe until proven otherwise. That's why many medications and supplements are discouraged during pregnancy, not because they're known to be dangerous, but because they're not known to be safe.

If you're looking for something for energy or well-being during pregnancy, talk to your doctor about options with stronger evidence. A balanced diet, adequate rest, and light exercise are always the first step.

What to do if you're already taking maca

If you've discovered you're pregnant and were taking maca, stop. There's no need to worry excessively, but you should inform your doctor at your next appointment. They can assess your specific case and reassure you or request additional tests if they think necessary.

If you're planning to become pregnant, the sensible thing is to stop maca before trying to conceive. That way you avoid any unnecessary exposure in the early months, which are the most critical for your baby's development.

And if you're breastfeeding, the same logic applies: stop and talk to your doctor. There's no data to support using maca while nursing.

In short: maca in pregnancy is not recommended, not because it's known to be dangerous, but because it's not known to be safe. The evidence is weak, and the precautionary principle says avoid it. If you still have doubts, talk to your doctor or pharmacist—they know your history and can give you personalised guidance.