Vegetarianism is the exclusion of meat and/or animal products from the diet. Types of vegetarianism range from complete exclusion of all animal-derived products (veganism) to less strict vegetarianism which allows eggs and dairy products (lacto-ovo vegetarianism). In UK, approximately 3% of the population are vegetarian.
Vegetarians are at risk of not getting the right balance of nutrients if they do not plan their meals carefully. The nutrients that would be readily provided by animal products need to be replaced in a vegetarian diet. Sometimes, this is not possible and consequently, vegetarians tend to have lower intakes of iron, vitamin B12, zinc.