Vegetable tango

Recommendations for the first two conditions are developed by nutritionists, but the third is reduced only to what food should be fresh. But it turns out, can be poisoned and fresh cucumbers and melons. When buying vegetables, you should assume that they may contain nitrates. Nitrates - substances that plants absorb from the soil and water, is processed into proteins and thereby provide their livelihoods. But then why are they harmful? The problem is that due to excessive and unwise use of nitrogenous fertilizers in intensive agricultural practices plants get too many nitrates, do not process them all and, therefore, accumulate in itself. Gradual accumulation in the body of these toxic substances can cause health damage, so be aware that fruits and vegetables without nitrate does not happen. By themselves, nitrates are not harmful to humans. The danger arises from the fact that some bacteria in the mouth or digestive system, process them into nitrites, which represent a real threat to health. When their connection to hemoglobin (blood protein that carries oxygen to tissues) does the breath at the cellular level, ie vital activity. Limiting the dose of nitrate - about 400 mg. Nitrites bind hemoglobin, preventing oxygen saturation, which can lead to disease metagemoglobinemiey with possible severe consequences (especially in infants and young children). In adults, the same people are really serious complications, with symptoms such as headaches, dizziness, tachycardia, numbness in various parts of the body, blurred vision, etc., can be caused by a very large doses of nitrite. Greatest risk are pregnant women, newborns and small children, they have this disease can give a fatal outcome. The fact that children under the age of three months is still 70% fetal hemoglobin, which is much more susceptible to nitrate and, therefore, becoming a metagemoglobin. In addition, the newborn digestive system has a neutral environment in which the conversion of nitrate to nitrite is faster. Therefore, never cook for young children water mashed unknown origin and type of vegetables spinach, which is often a high concentration of nitrates. Chemical fertilizers change the composition of food products: nitrogen - reduce the biological value of proteins, reduces the amount of trace elements, reduce the amount of dry matter (as retain water), reduce the ability to store, potassium - reduce the amount of trace elements, phosphate - reduce vitamin content.