Food and tumors

Nutrition, as a rule, is not the decisive factor in the occurrence and progression of tumors, but it is of unquestionable importance in all stages of process of development and growth of tumors.
A General limitation of the number and the caloric intake leads to decrease the frequency and delay the appearance of tumors induced in mice carcinogenic substances. The same applies to spontaneous carcinoma breast, hepatoma and lung adenomas and leukemia mice. Energy malnutrition has a special impact on carcinogenesis. A significant delay in growth, and reduction of body weight lead to a sharp decrease in the number of developing Acting against a number of Acting, for example breast cancer in mice, restrictions in diet can affect the development of tumors directly, but changing hormonal balance.
Regarding the effects of individual components of food evidence on increasing and strengthening growth Acting with the increase in food quantities of fats and lipids, including cholesterol. An important role can be played by vitamin deficiency. This applies in particular to the reduction of the number of Riboflavin in food that leads to a significantly larger number of O. liver caused by rats and mice carcinogenic aminoazobenzene.
In some cases, certain deficient diet can cause the development of neoplasms, even without the introduction into the organism known exogenous blastomogenic substances. So, in rats fed diets with insufficient vitamin a, developed papillomatosis rumen; received hepatoma in rats in the diet which sharply reduced the content of choline. Thus, there is direct evidence of a link between the origin of the tumor and certain metabolic disorders.
Malnutrition, apparently, can cause liver cancer in humans. So, the well-known frequency of primary liver cancer in blacks Bantu in South Africa, as well as in native Java, Sumatra, Japan and China can also be attributed to the failure of choline and other violations of the currency, causing degeneration, cirrhosis and liver cancer.
When analyzing the value of nutrition in already developed cancer should distinguish shared his influence mainly on the growth of tumors and the specific cases of the effects of certain private malnutrition. In respect of liver cancer was shown the possibility of such specific influences. The overall effect is well proven in experiments on transplantation O. who are vaccinated in fewer cases and grow more slowly in animals with low power.
As for the total value of the supply for the occurrence, development and growth of human tumors, excessive eating the elderly, the weight of which exceeds the average, more likely to die from cancer than those of the middle or lower weight. The difference in mortality from cancer among people with excess and low-weight is 50%.