Vegetarian Diet Issues - Vitamin B12
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Acknowledgement:
This article on vegetarian issues are based upon copyright materials from the outstanding health website Mercola.com ©Copyright 2003 Dr. Joseph Mercola. We recommend this website.
The author of this article is Stephen Byrnes: see References

Vegetarian References:
Numbers in brackets refer to vegetarian references. See References

Can Vitamin B12 Be Obtained from Plant Sources?

Vegans who do not supplement their diet with vitamin B12 will eventually get anaemia (a fatal condition) as well as severe nervous and digestive system damage (6). Claims are made that B12 is present in certain algae, tempeh (a fermented soy product) and brewer's yeast. All of them are false.

Like the niacin in corn, the B12 analogues present in algae and tempeh are not bioavailable. We know this because studies done on people's blood levels of B12 remained the same after they ate spirulina and tempeh; there was no change, clearly indicating no absorption by the body (7). Further, the ingestion of too much soy increases the body's need for B12 (8). Brewer's yeast does not contain B12 naturally; it is always fortified from an outside source.

Some vegetarian authorities claim that B12 is produced by certain fermenting bacteria in the intestines. This may be true, but it is in a form unusable by the body. B12 requires intrinsic factor from the stomach for proper absorption in the ileum. Since the bacterial product does not have intrinsic factor bound to it, it cannot be absorbed (9).

It is true that vegans living in certain parts of India do not suffer from vitamin B12 deficiency. This has led some to conclude that plant foods do provide this vitamin. This conclusion, however, is erroneous as many small insects, their eggs, larvae and/or residue, are left on the plant foods these people consume, due to non-use of pesticides and inefficient cleaning methods. This is how these people obtain their vitamin B12. This contention is borne out by the fact that when Indian Hindus migrated to England, they came down with pernicious anaemia within a few years. In England, the food supply is cleaner, and insect residues are completely removed from plant foods (10).

The only reliable and absorbable sources of vitamin B12 are animal products, especially organ meats and eggs (11). Though present in lesser amounts, milk products do contain B12. Vegans, therefore, should consider adding dairy products into their diets. If dairy cannot be tolerated, eggs, preferably from free-run hens, are a virtual necessity.

That vitamin B12 can only be obtained from animal products is one of the strongest arguments against veganism being a "normal" way of human eating. Today, vegans can avoid anaemia by taking supplemental vitamins or fortified foods. If those same people had lived just a few decades ago, when these products were unavailable, they would have died.

More Vegetarian Articles
Does Meat Consumption Use Up Too Many Natural Resources?
Can Vitamin B12 Be Obtained from Plant Sources?
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Can The body's Needs For Vitamin A Be Entirely Obtained From Plant Foods?
Meat-Eaters Have Higher Rates of Heart And Kidney Disease, Cancer, Obesity Than Vegetarians
Vegetarians Live Longer And Have More Energy and Endurance Than Meat-Eaters
The "Cave Man" Diet Was Low-Fat and/or Vegetarian
Meat and Saturated Fat Consumption
Soy Products Are Adequate Substitutes For Meat and Dairy Products
The Human Body is Not Designed for Meat Consumption
Animal Products Contain Numerous, Harmful Toxins
Eating Animal Foods Is Inhumane
The Value of Vegetarianism

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Vegetarianism is a healthy option and vegetarian diets can be perfectly healthy eating plans but care should be taken to ensure optimum nutrition. So, whether following an ovo-lacto or other type of vegetarian food plan, or vegan diet, for a healthy body and weight make it a balanced eating plan and take regular exercise. Always consult a doctor before beginning a weight loss diet or new fitness routine.
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