For example, you may be able to handle higher dosages when you are coming down with a cold or flu than when you are feeling well. Too bad for us department. Most animal species can internally synthesize their own vitamin C, particularly when their immune systems become challenged. Only humans, primates, guinea pigs, and a rare species of Indian bat do not have this ability, because their bodies lack one of the four enzymes required for vitamin C synthesis. If we'd been as lucky as the majority of the animal kingdom, the average human would probably be able to make from 6-10 grams of vitamin C per day.
Mental blocks lead to poor nutrition.
These attitudes may be partly responsible for the current upsurge in supplement taking, but nutritionists know that nothing takes the place of eating well. Healthy diet may prevent prostate cancer. A recent University of Massachusetts study on worldwide prostate cancer mortality rates associated diets rich in whole grains, soybeans, fish and nuts with a lower incidence of death from prostate cancer. Alternatively, a diet high in fats, calories, and animal foods was linked to higher risk of death from this disease. Following their November 1998 annual meeting, the AHA issued an advisory recommending that individuals with a history of heart disease who exhibit elevated levels of the amino acid homocysteine be sure to consume adequate levels of vitamins B6, B12, and folic acid.