Which Vitamins is likely to be lacking in a vegan diet?
Vitamin B12 and vitamin D can get deficit in vegans due to non intake of non vegetarian food and dairy based products.
They should take supplements along with nuts to overcome B12 deficiency
Yes, they are at a higher risk of developing B12 deficiency
Vegans can find non-heme iron in dried beans and legumes, dark green leafy vegetables, dried fruits, nuts and seeds, and wholegrain cereals and breads