What are the main causes of Vitamin B12 deficiency?
Animal products are the only foods that provide significant amounts of Vitamin B12. The richest sources of Vitamin B12 are liver and kidneys. Fish, eggs, cheese and meat also contain good amounts. There are no significant plant sources. Some researchers claim to have discovered Vitamin B12 in algae, seaweeds and fermented foods such as tempeh – however now it has since been shown that what they found was not true Vitamin B12. People at risk of Vitamin B12 deficiency from nutritional factors include: Vegans A vegan diet must be supplemented with Vitamin B12. The body is able to store Vitamin B12 and also has clever mechanisms for recycling it when there is a dietary lack – however eventually it will become depleted. It is particularly important to take Vitamin B12 supplements immediately on converting to a vegan diet, because it takes some time for the intestines to become more efficient in recycling. Calcium may also need to be supplemented. This mineral is necessary for Vitamin B12 ab