Table of Contents
Introduction
Some supplements are perfect to take before getting pregnant, but once you get pregnant, it’s best to avoid them entirely.
These supplements are perfect when you’re without a child and they do wonders for your health, but pregnancy is a different phase entirely. Your body is creating new life and taking these supplements daily can affect the baby adversely.
You might be wondering what to and what not to take during pregnancy. In this article, we’re answering the question “what can I take during my pregnancy?” Discover the supplements you should avoid during pregnancy for a healthy pregnancy, why they are harmful, and safer alternatives for you.
Why Are Some Supplements Unsafe During Pregnancy?
During pregnancy, everything you consume has the potential to affect your developing baby. This includes vitamins, minerals, and herbal supplements. While some nutrients are essential, others can pose serious risks. Certain supplements contain substances that, when passed through the placenta, may interfere with fetal development, increase the risk of complications, or even cause harm to the mother.
Here’s a closer look at why some supplements are unsafe during pregnancy and how they can impact both you and your baby.
- They can cross the placenta and affect fetal development.
- They may trigger preterm labor or miscarriage.
- There’s a risk of stillbirth and pregnancy complications.
- They Can Cause Congenital Malformations.
If you’re currently pregnant or working towards getting pregnant, then you should always consult a healthcare provider before taking any supplement to ensure both your safety and that of your baby.
Top Supplements to Avoid During Pregnancy
Pregnancy is a time when nutrition is more important than ever. While some supplements are essential for a healthy pregnancy, others can do more harm than good.
Here’s a guide to the top supplements to avoid during pregnancy.
1. Vitamin A (High Doses)
- Vitamin A is important for fetal development, but excessive amounts, especially as retinol or retinyl palmitate, can lead to serious birth defects. Studies show that consuming more than 10,000 IU of preformed vitamin A daily increases the risk of congenital disabilities affecting the skull, heart, and brain.
2. Herbal Supplements (e.g., Black Cohosh, Goldenseal)
Just because many herbal supplements are labeled “natural” doesn’t mean they’re safe to use while pregnant. Some herbs can stimulate uterine contractions, interfere with fetal development, or even cause miscarriage. Black cohosh can cause contractions and lead to premature labour. Large amounts of fenugreek can cause uterine contractions, miscarriages or preterm labour.
3. Fish Oil with High Vitamin A Content
Having looked at Vitamin A as harmful during pregnancy, it is advised that you avoid Fish oils which are a major source of vitamin A.Because fish oils have a high Vitamin A content, pregnant women should avoid them. Certain species of fish such as cod contain significant amounts of fish oil. 1 tablespoon of cod liver oil contains about 4500 IU of vitamin A.
4. Ephedra and Other Stimulants
Ephedra, once a common ingredient in weight loss and energy supplements, is now banned in many countries because of its dangerous side effects. Taking stimulants such as ephedra may stimulate the fetus’ heartbeat, which may cause death
5. Unregulated or Unknown Supplements
Not all supplements are tested for safety, and some may contain harmful ingredients, heavy metals, or contaminants that can harm fetal development. The FDA does not strictly regulate all dietary supplements, so quality can vary and you have to be careful with what you take.
Why Are These Supplements Harmful?
We’ve looked at the supplements that can pose serious risks during your pregnancy and maybe you’re wondering why something that has been part of your daily routine can’t be part again because you’re pregnant.
Let’s find out exactly why these seemingly beneficial substances are dangerous for you and your baby.
- They can cause developmental abnormalities
- Vitamin A increases the risk of liver toxicity in the mother.
- Contaminants like mercury in some fish oil supplements create a risk to fetal brain development.
- Black cohosh and fenugreek can trigger premature labor
- Ephedra can lead to premature birth or low birth weight because it is originally used in weight loss supplements.
- Ephedra also increases heart rate and blood pressure, which can be dangerous during pregnancy
So, there you have it. These are the reasons you should avoid normal supplements during pregnancy. The advice is to stay away from them during both pregnancy and breastfeeding
Safe Alternatives for Nutrition during Pregnancy
While some supplements can be harmful during pregnancy, there are safe and effective ways to get the essential nutrients needed for both maternal health and fetal development. The best approach is to focus on a balanced diet rich in vitamins and minerals and take only doctor-approved prenatal supplements when necessary. Here are some safe supplements to support a healthy pregnancy.
1.Prenatal Vitamins (Doctor-Recommended)
A high-quality prenatal vitamin provides essential nutrients without the risks associated with high doses or unregulated ingredients.
- Folic Acid (400mcg)–Prevents neural tube defects such as spina bifida during the formation of a baby.
- -Iron (27 mg)–Supports oxygen transport and prevents anemia.
- -Calcium (1000 mg) & Vitamin D(10mcg)–These are both essential for bone development of the baby.
- -DHA & EPA (Omega-3s)–Always lookout for supplements that contain these two they support brain and eye development.
- Nutrient-Rich Whole Foods
A well-balanced diet can provide most of the necessary vitamins and minerals. You should focus on:
- –Leafy Greens (Spinach, Kale, Broccoli)–High in folic acid, calcium, and iron.
- –Dairy Products (Milk, Yogurt, Cheese)–Significant sources of calcium and proteins.
- Natural Energy Boosters
Instead of harmful stimulants like ephedra, you can try:
- -Iron-rich foods to prevent fatigue.
- -B-complex vitamins (from whole grains and eggs).
- -Drinking enough water helps maintain energy levels.
- Herbal Teas in Moderation
While some herbal supplements are unsafe, certain teas can be beneficial, such as ginger tea, which helps with nausea and morning sickness and chamomile tea that promotes relaxation and better sleep.
The safest way to nourish your body during pregnancy is through a healthy diet and doctor-approved prenatal vitamins.
Frequently Asked Questions
Yes, they definitely are. You can take Vitamin D, prenatal vitamins as advised by your doctor, calcium and supplements that contain DHA and EPA.
Avoid herbal supplements during pregnancy if you must use them, check with your doctor beforehand to determine their effects.
We advise you to contact your doctor or healthcare provider immediately. They could assess the potential risks and advise you on the best course of action to take throughout the remainder of your pregnancy.
Final Thoughts for You
During pregnancy, every supplement and nutrient choice matters. While some vitamins and herbs may seem beneficial, certain supplements can pose serious risks to both mother and baby.
Instead, focus on a balanced diet, doctor-approved prenatal vitamins, and safe nutrient sources to support a healthy pregnancy. Always consult a healthcare provider before taking any supplement to ensure the best outcomes for you and your baby.
- What vitamins and supplements should i avoid during pregnancy? MedicineNet.
- Vitamins, minerals and supplements in pregnancy. nhs.uk.
- Laelago T. Herbal Medicine Use during Pregnancy: Benefits and Untoward Effects. IntechOpen; 2018.
- Brody JE. Study links excess vitamin a and birth defects. The New York Times.October 7, 1995. Accessed March 8, 2025.
