The threat of B12 deficiency remains one of the great stumbling blocks for raw vegan, cooked vegan, and even SAD dieters, and for good reason. A deficiency can cause permanent damage to the brain and body, but the science behind how we reach that state is so vague as to be almost useless.
After three and a half years of only eating raw fruits and vegetables, I should be deficient by the reckoning of many researchers.
After being badgered for years about the threat to my health, I finally gave in and got a blood test.
How did I do? You can read about my results here.