Taking Vitamin B3 (Niacin) During Pregnancy – Importance, Food Sources and Dosage

Key Takeaways

Vitamin B3 in pregnancy plays an important role in energy production, nervous system function, and the healthy development of your baby. According to the US National Institutes of Health (NIH), the recommended daily intake of niacin during pregnancy is 18 mg niacin equivalents (NE) for adults and 17 mg NE for pregnant teenagers (1).

Getting enough vitamin B3 through a balanced diet can support maternal nutrition throughout pregnancy. But which foods provide niacin, how much do you need daily, and are supplements necessary? Let’s look at its benefits, food sources, recommended dosage, and safety considerations.

What Is Niacin?

Niacin, or nicotinic acid, is Vitamin B3, a water-soluble chemical essential human nutrient. Vitamin B3 is also found in another form called nicotinamide. Both forms of Vitamin B3 are vital for human life. Vitamin B3 is converted to NAD (nicotinamide adenine dinucleotide), which is necessary for metabolising fat, carbohydrates, protein, and alcohol in the body to give us energy. Vitamin B3 is also necessary for DNA repair, cell signalling, and synthesis of fatty acids (2).

Niacin vs. Nicotinamide

Niacin and nicotinamide are two forms of vitamin B3 that support energy metabolism and cellular health. However, they differ in their effects on blood lipids, side effects, and therapeutic uses (3).

Importance of Vitamin B3 in Pregnancy

Vitamin B3 is an essential nutrient required for pregnant women so that the foetus is well-nourished and develops properly. Here are some reasons why Vitamin B3 is important for pregnant women (4):

1. Prevents Birth Defects

Research shows that flaws in the genes that produce NAD cause birth defects in babies. Hence, taking adequate vitamin B3 can prevent certain birth defects and complications.

2. Essential for the Development of Baby’s Brain

Niacin is necessary for the healthy development of the baby’s brain and nervous system.

3. Prevents Miscarriages

If the developing foetus has abnormalities, miscarriage can occur. Hence, taking Vitamin B3 can also prevent miscarriages.

4. Gives Us Energy

Vitamin B3 plays a crucial role in the metabolism of fats, proteins, carbohydrates, and alcohol, giving our body the energy it requires.

5. Keeps Skin and Other Organs Healthy

Taking vitamin B3 is necessary for healthy skin, nervous system, and mucous membranes.

6. Reduces Nausea and Improves Digestion

Taking vitamin B3 has been found to reduce morning sickness and aid in digestion.

7. Reduces Migraines

Vitamin B3 has been found to reduce migraines.

Recommended Daily Intake of Niacin for Pregnant Women

The recommended dietary allowance (RDA) of niacin when pregnant is 18 mg daily, with an upper limit of 35 mg per day. Any amount between 18 and 35 mg is acceptable, but more than 35 mg per day is not recommended (1).

Niacin Deficiency

Recognising the signs of vitamin B3 deficiency is important, as symptoms may develop gradually and can affect overall health. Common signs include (5):

• Redness and irritation of the skin
• Headaches
• Digestive problems
• Depression and mood swings
• Inability to focus
• Dizziness
• Fatigue and poor circulation

Some people are at a higher risk of vitamin B3 deficiency (6):

• People who consume corn or sorghum as a staple diet
• Alcoholics
• People with poor diets or those suffering from malnutrition
• People with slow-growing tumours

Food Sources of Vitamin B3

The various food sources that contain Vitamin B3 (Niacin) are (7):

• 113 g chicken breast – 14.4 mg of niacin
• 113 g salmon – 11.3 g niacin
• 113 g tuna – 5 g niacin
• 133 g turkey – 5 mg niacin
• 142 g mushrooms – 5.4 mg niacin
• 113 g lamb – 7.8 g niacin

Niacin is also found in green peas, peanuts, beef, sunflower seeds, avocado, asparagus, liver, broccoli, and veal.

FAQs

1. Can you take vitamin B3 supplements while pregnant?

If you are wondering, is niacin safe during pregnancy, the answer is yes. Niacin is safe if taken within the RDA of 18 to 35 mg daily. Any amount between 18 and 35 mg is acceptable. However, more than 35 mg per day is not recommended for pregnant women.

2. What happens if you take too much vitamin B3 in pregnancy?

Niacin and pregnancy are interlinked, as niacin is essential for properly developing the baby’s brain. However, taking too much vitamin B3 for pregnancy can cause side effects like skin flushes and liver damage (8).

3. Are there any interactions between niacin and other prenatal vitamins?

Niacin generally works well with other prenatal vitamins, as they collectively support maternal and fetal health. However, high doses of niacin can sometimes interfere with the absorption or effectiveness of other vitamins and minerals. It is essential to follow a doctor’s guidance when taking multiple supplements to ensure a balanced intake without adverse interactions.

4. How can vegetarians or vegans ensure they get enough niacin during pregnancy?

Vegetarians and vegans can still meet their niacin needs through plant-based sources. Foods such as peanuts, sunflower seeds, brown rice, mushrooms, green peas, and avocados are excellent sources of niacin. Additionally, fortified cereals and plant-based milk can help boost niacin intake.

Vitamin B3 and pregnancy go hand in hand, as adequate intake of this essential nutrient supports pregnant women to ensure the healthy development of the unborn baby. However, talk to your obstetrician before taking vitamin B3 supplements. The doctor will decide if you require it and will recommend a dosage that is suitable for you.

Also Read: 

Vitamin C in Pregnancy
Vitamin A when Pregnant
Taking Vitamin E while Pregnant
Vitamin B2 (Riboflavin) during Pregnancy
Is It Safe to Take Vitamin B6 in Pregnancy Diet?

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Sources References

1. National Institutes of Health – Niacin

2. Mayo Clinic – Niacin

3. American Academy of Ophthalmology – Nicotinamide Safety Concerns

4. Cleveland Clinic – Niacin

5. Harvard T. H. Chan School of Public Health – Niacin – Vitamin B3

6. National Library of Medicine – Niacin Deficiency

7. European Food Information Council – Niacin: foods, functions, how much do you need & more

8. University of Rochester Medical Center – Niacin