B12 in food
Vitamin B12 is found in almost all foods of animal origin so is one of the most common nutrient deficiencies among vegans.
Green plants do not provide Vitamin B12 and although it can be synthesized by some algae and bacteria, the bioavailability of Vitamin B12 from plant-based dietary forms is disputed.
To get B12 in your diet try foods fortified with Vitamin B12 such as cereals, vegan spreads and nutritional yeast flakes, and fortified plant-based milks.