In man, physiological amounts of vitamin are absorbed by the intrinsic factor mediated mechanism exclusively in the ileum, the third portion of the small intestine. Human faeces contain appreciable quantities of vitamin B12 or vitamin B12-like material presumably produced by bacteria in the colon, but this is unavailable to the non-coprophagic individual. However, the human small intestine also often harbours a considerable microflora and this is even more extensive in apparently healthy southern Indian subjects. We now show that at least two groups of organisms in the small bowel, Pseudomonas and Klebsiella sp., may synthesise significant amounts of the vitamin.
All about fruitarianism with a long-term fruitarian, Lena
B12 May Be Synthesized by Small Intestine Microflora
Similar by Tags
Top 20 Tags
William of Ockham
Entities should not be multiplied unnecessarily.
A plant-based diet is a diet of any animal (including humans) based on foods derived from plants, including vegetables, whole grains, legumes and fruits, but with few or no animal products.
"Plant-based diet" has been used to refer to the following diets:
- Vegan diet - no food from animal sources.
- Fruitarian - consists primarily of fruit.
- Raw vegan - food is uncooked and sometimes dehydrated.
- Vegetarian - plant foods, may include eggs and dairy, but no meat.
- Ovo-lacto vegetarian - includes dairy and eggs.
- Ovo vegetarian - includes eggs but no dairy.
- Lacto vegetarian - includes dairy but no eggs.
- Pescatarian - diet with eggs, dairy and seafood.
- Semi-vegetarian - with occasional inclusion of meat.