Oh! and Beef Liver has the highest levels of Vitamin B12, Niacine and Riboflavin (other B vitamins, I believe B3 and B6). Thiamine is B1 if I'm correct; all responsible for energy levels... Beef liver is also the highest source of Vitamin A. However, another reason we should have been taught nutrition from an early age: there are two vitamin As; what is found in plants and what is found in animal protein. Like bananas and potassium, we have been misled about Carrots and Vitamin A (carrogenan/Beta Carotene)... for eye sight? NO. For strengthening the immune system. For eye sight is Vitamin A from animal protein...
It is possible that Vitamin E (and there are 8 types) is for eyesight, since it protects your cells from AGEs or free radicals that crystalize the cornea... and cause the fracturing of the cornea and the formation of cataracts... The 3 vitamins for protecting the immune system are Vitamin C, Vitamin E and Vitamin A... they are also anti-oxidants... It has so much to do with free radicals...
You never thought that nutrition would be interesting?
If I could truly memorize this stuff... The non-Mexican medical students were accepted into medical school because of their capacity to memorize. SO WHY IN THE NAME OF GOD WERE THEY NOT "FORCED" TO MEMORIZE NUTRITION????
And with that, I must go...