Spirulina (blue-green algae) has 250% more of Cobalamin (B12) than beef liver, previously thought to be the Nature's richest source of it.
The next best source is yoghurt and then diary products. Meat is quite far down the list.
We only need minute traces of Vitamin B12 in our diet, as little as 1 microgram per day. Half of a gram of spirulina will do the job. By comparison, you need to eat some highly toxic liver or hundreds of grams of meat. This can bring you far more trouble than benefit. Do you know what diseases an animal had before it was killed for meat?
B12 can be synthesized by living microorganisms in the intestines. This is how a cow gets it, despite the fact that it eats only grass.
It seems that the best we can do is to become friends with bacteria in our intestines by taking care of the CONDITIONS there. Living in symbiosis is always the best. This is how Nature is designed.
Consider an industry that greatly benefits financially when people are sick. The more sick - the better their business. Would you believe their "health advice"? Explore MOTIVES. In every propaganda facts are very carefully selected and interpreted. Sharpen your filters.