The contradictory conclusion, however, is that people only need between 75 and 125 mg of vitamin C a day. These types of contradictions may be explained by the fact that many different people were involved in writing the 512-page book. When it comes to vitamin C and cancer, the authors again provide substantial data from the published literature to show both potential risk reduction benefit, definitive risk reduction benefit or no risk reduction benefit. Since some studies show no risk reduction benefit, the authors advise against vitamin C supplementation for the purpose of cancer prevention. The same hold true with immune function.
Some studies show positive benefit, others show no benefit.
Therefore, according to the authors, vitamin C supplementation is not recommended. Each one of the above nutrients has been shown to provide specific health benefits, and many work together in a synergistic fashion to protect against the onset of degenerative disease. While the 512-page book cited many published studies documenting the beneficial effects of vitamin C, there were serious omissions. The most significant study that was omitted was published in the American Journal of Clinical Nutrition in August 1996. This study examined 11,178 elderly people over a 9-year period.