A distinctive feature of vitamin B12 is that as opposed to other vitamins, animal sources are the only reliable sources for its intake. Vitamin B12 is mainly found in meat, eggs, dairy products and fish. A precious source of vitamin B12 is calves liver, which contains such a high quantity of vitamin B12 that even individuals who lack the intrinsic factor can absorb this in sufficient quantities to prevent pernicious anemia .There’s much controversy vis, vis the proposed plant sources of vitamin B12. Some findings suggest that fermented soya products, seaweeds, and algae like spirulina all contain significant amounts of vitamin B12.
Nevertheless, analysis reveals that due to the presence of compounds structurally comparable to vitamin B12, termed as B12 analogues, there’s difficulty in distinguishing between the two forms and these can’t be utilized to satisfy dietary needs. The most common view today is that plant sources of vitamin B12 aren’t likely to be available to humans and therefore can’t be tagged as safe sources of the vitamin. There’s some question as to whether vegetarians and vegans acquire enough vitamin B12. They’re at a risk of developing a deficiency syndrome because natural food sources of this vitamin are limited to animal foods.
Therefore, vegetarians are advised to include a rich intake of foods enriched with vitamin B12 within their diet schedule. Good sources of this vitamin are fortified cereals, dairy products like la soybeans, free range eggs and sunflower margarines. Strict vegetarians and vegans who don’t even consume plant foods fortified with vitamin B12 need to consider taking an in a supplement that contains vitamin B12 in either oral or dietary form. There are claims that vitamin B12 can be consistently obtained from nutritional yeasts.
Nevertheless, one should be aware that there’s no substantial evidence to validate such a claim. Bacteria exclusively synthesize vitamin B12. Streptomyces griseus, a bacterium once thought to be a yeast, was once a source of vitamin B12. Now, the bacteria Propionibacterium shermanii and Pseudomonas denitrifican have replaced it as the most recent commercial sources. Crab, 3 ounces, 8.8 mcg, Salmon, 3 ounces, 2.4 mcg, Rockfish, 3 ounces, 1.0 mcg, Beef, 3 ounces, 2.1mcg, Chicken, 3 ounces, 0.3 mcg, Turkey, 3ounces, 0.3 mcg, Egg, 1 large, 0.4 mcg, Milk, 8 ounces, 0.9 mcg, Brie, 1 ounce, 0.5 mcg. Vitamin B 12 .