At this age, men begin to think about posterity, and this means that they need to take care of their health, a child born viable and immune to disease. Doctors recommend a 30-year-old man in the diet include Brazil nuts, which support high-quality sperm. The negative impact on the male body on factors such as smoking and air pollution, could affect the viability of sperm cells to change the structure of DNA and increase the risk of having children with birth defects. To reduce the likelihood of these adverse events should be included in the daily menu Brazil nuts. They are rich in selenium - an element that supports the health of sperm cells and increases the speed of movement of sperm. British scientists have found during research that the increase in the content of selenium in the diet helps men suffering from infertility, to become fathers. In addition, Brazil nuts a lot of Vitamin E - antioxidant that protects sperm cells from the damaging effects of free radicals. The second product that is recommended for men in this age - the liver. Very few foods contain vitamin A in larger quantities than the liver. Meanwhile, this vitamin is very important for normal conception. Studies show that men who receive daily vitamin A in sufficient quantity, the quality of semen and sexual activity is higher than that of those who suffer from its deficiency. When the content of vitamin A in the body is reduced, the number of sperm produced is reduced. Liver is also an excellent source of zinc. The organism spends 5 mg zinc (one to heat the daily requirement) for each ejaculation, so that romantic weekend spent with his beloved, can completely deplete the reserves of this element in the body. A man who dreams of healthy children are encouraged to include in the diet peaches. This is the second largest (after the liver), improving the quality of sperm. And it must be stressed: during the freezing of vitamin C stored in these fruits is better than conventional storage, frozen peaches in it even more than in oranges. Scientists have found that a daily dose of vitamin C (200 mg) helps to increase the number of active sperm in semen. This vitamin also increases the chances of sperm reach the egg and fertilize it. Experts recommend to freeze slices of peaches and prepare them to fruit cocktails or dobaatat in cereal mixture. In one cup of frozen peaches contain more than the recommended two daily doses of vitamin C.