#310--B12 is a vitamin essential for cellular energy. It is found only in animal foods, and its release is predicated on HCL (hydrochloric acid) production. Thus, older people, who typically see a decline in the ability to produce HCL for a variety of reasons including dehydration, will often be deficient in this critical nutrient. Interestingly enough, poor B12 status can mimic senility. That's not surprising when one considers that this nutrient is responsible for promoting normal nerve growth by maintaining the fatty sheaths which cover the nerve endings. So eating quality meat, and maintaining HCL production at adequate levels, may be one of the key strategies in maintaining cognitive functions as we age. Fire up the grill, Grandpa!