Vegan diets are rich in fibre, vitamin C and folate (thanks to all that fruit and veg) but you may be lacking in a number of other vitamins and minerals. Vitamin B12 is a good example. We need it for healthy red blood cells and nerve function, but because it’s typically found in animal foods like eggs, milk and cheese, full-time vegans need to include fortified breakfast cereals and soya products, and possibly consider taking a B12 supplement