There is no evidence for an increased requirement for this vitamin in old age. Vitamin B12 is produced by bacteria in the human gut but distal to the site where it can be absorbed. Therefore it is recommended that this vitamin is included in the diet. For vegans, B12 fortified foods include yeast extracts, some vegetable stocks, TVP, certain soya milks and margarines, and some breakfast cereals. Fibre Fibre is important for providing bulk to enable food to pass through the gut easily.
Constipation is a common problem in the elderly which is often due to a low fibre diet.
However, vegan diets are generally rich in fibre ensuring the digestive system stays healthy, active and regular. Transit time in the elderly is no different than for the younger population. Good sources of fibre include fruits, dark leafy vegetables, grains and legumes. Some elderly people may have a fading sense of thirst which can lead to dehydration. Dehydration can cause mental confusion, headaches and irritability and so it is important that fluid intake is checked.