Vitamin B3: How to make sure you’re getting enough on your vegan diet

Read Time:   |  21st June 2019

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Vitamin B3 was the third B vitamin to be discovered – hence the name! It is also known as niacin. Find out why we need it, how to get enough of it and what the best vegan sources of vitamin B3...


Vitamin B3 helps to release energy from the foods we eat, is essential for many basic reactions in the body and helps to maintain the nervous system and keep our skin healthy.

Men need around 17 milligrams a day and women, around 13 milligrams per day.

Are we getting enough vitamin B3?

The 2014 UK National Diet and Nutrition Survey found that average daily intakes from food were above the recommended level for most people, with less than 0.5 per cent failing to meet targets.

Cereals and cereal products were the largest contributor of niacin for younger children.

Taking high doses of nicotinic acid supplements (over 200 milligrams daily) can cause skin flushes and taking extremely high doses, 3-6 grams daily, can be toxic and lead to liver damage.

Government guidelines say that taking 17 milligrams or less of nicotinic acid supplements a day, or 500 milligrams or less of nicotinamide supplements a day, is unlikely to cause any harm.

Do I need a supplement vitamin B3?

No, a healthy vegan diet containing the foods below on a daily basis will cover your needs.

The best plant sources of vitamin B3

The best plant sources of B3 include nutritional yeast, peanuts, fortified vegan breakfast cereals, quinoa, muesli, yeast extracts such as Marmite or Vegemite, wild rice, wholemeal spaghetti, sweetcorn, brown rice and acorn squash.

vegan sources of vitamin b3

Nutritional yeast is a food additive that can be used as a condiment or ingredient and is made from yeast grown on molasses and then harvested, washed and heated to kill or ‘deactivate’ it. It doesn’t froth or grow like baking yeast as it is inactive. It is sold in tubs of flakes that can be sprinkled on dishes or added to sauces.

Very popular with vegans, it has a slightly cheesy, nutty flavour and it even has its own nickname – nooch! A five gram teaspoon of nutritional yeast provides 100-130 per cent of your daily requirement of niacin. It’s best to buy one that’s fortified with a vegan source of vitamin B12 to cover all bases!

You should be able to get all the niacin you need from your daily diet but it can’t be stored in the body so you need it in your diet every day.

vegan sources of vitamin b3

Signs of deficiency

If you’re not including enough B3 in your diet, some of the symptoms you might experience include lesions on any areas of skin that are exposed to sunlight and/or pressure, diarrhoea and, in extreme cases, loss of mental capacity.

The disease caused by severe niacin deficiency and characterised by these symptoms is called pellagra – which means rough or raw skin.

A healthy, varied vegan diet, with a generous sprinkle of nutritional yeast now and again, should provide all the vitamin B3 you need.

Written by

Veronika Charvatova

Veronika Charvátová MSc is a biologist and Viva! Health researcher. Veronika has spent years uncovering the links between nutrition and good health and is an expert on plant-based diets.

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