One common concern about vegan diets is whether they provide your body with all the vitamins and minerals it needs. Many claim that a whole-food, plant-based diet easily meets all the daily nutrient requirements. Some even encourage vegans to avoid all supplements.

What four nutrients do vegans lack?

However, following a poorly planned vegan diet can result in an insufficient intake of certain vitamins and minerals including vitamin B12, calcium, iodine and iron. It is therefore essential that vegans avoid fast-food vegan diets that are lacking in nutrients and follow whole-food diets instead.

What are vegans at risk for?

Vegans are at higher risk of the deficiency in vitamin B12. Deficiency in vitamin B12 can lead to certain irreversible side effects. Vegans are advised by the doctors to keep consuming the supplements of vitamin B12 to prevent health conditions such as constipation, fatigue, weakness, anemia and appetite loss.