The substance caffeine is perhaps one of the most famous among the inhabitants of megacities, because it is an integral part of an active life, both day and night. But besides this, caffeine is often used both as a drug and as a means for weight loss. Its popularity is due to its effectiveness, but, like any substance, caffeine should be approached with knowledge of the matter. he alone determines the significance of matter in our life. Caffeine is a nitrogenous organic compound that is physically expressed as white or clear needle-shaped crystals that taste bitter but are odorless. Caffeine is a chemical substance, one of the derivatives of mateine ​​and guaranine, which is sometimes used as a synonym for caffeine itself. The name "caffeine" was given to the substance as early as 1819 by Ferdinand Runge, however, pure caffeine was obtained only in 1828. Initially, it was isolated from the leaves of black tea and was called theine. A complete description of the substance was created by the end of the 19th century. It is worth noting that pure caffeine is poorly soluble in cold water, practically insoluble in ethanol. The highest solubility of the substance is observed in hot water and chloroform. Products containing caffeine Of course, the primary products that contain caffeine are almost all types of tea, coffee and cocoa. At the same time, drinks made from these derivatives contain a much smaller amount of a substance than directly cocoa beans and coffee or tea leaves. Similar in terms of caffeine content in fruits is the guarana plant - a climbing vine whose beans are very similar to coffee. Another "relative" of these sources of caffeine can be called cola - an evergreen tree with fruits that also resemble coffee beans. It is worth noting that in everyday life a person is unlikely to chew cocoa beans or tea leaves to get the required amount of caffeine. In the morning we prefer a cup of coffee, in the afternoon we drink tea or eat a chocolate bar. There are a lot of options for so-called snacks, so they are worth mentioning. These include almost all products containing cocoa beans - chocolate bars, cocoa, cocoa drinks, chocolate cakes and pastries, desserts. In the latter, the amount of caffeine, of course, is not large, therefore, you should not lean on them, since the desired invigorating effect will not occur. due to additional substances, in particular ascorbic acid and taurine. For those who are not able to use sweets with chocolate or coffee, the use of drinks themselves, especially energy ones, you can turn your attention to caffeine preparations. It is worth noting that there is a large assortment of them in pharmacies - some are purely therapeutic in nature, some are aimed at preventing fatigue and drowsiness, a general loss of nutrients, and some are prescribed as a supplement for weight loss. In these cases, caffeine can be in the form of injections, droppers, special solutions, tablets, including those for children. up to 500 mg of caffeine, but not less than 100-200 mg. In this case, the child during therapy is prescribed 30-75 mg of caffeine 2-3 times a day. In the case of a child's body, one should be especially careful, since in order to replenish the substance in their case, it is worth choosing exclusively natural products, such as cocoa, or caffeine preparations strictly prescribed by a doctor. Otherwise, for a young organism, this may be fraught with a violation of cardiovascular and nervous activity, increased excitability with corresponding manifestations in the behavior of the child. In the treatment and prevention of adult diseases, increased doses of caffeine and additional intake of products containing this substance may be prescribed. In turn, there are quite a few cases when this is necessary: ​​- drowsiness, loss of strength; - a general decrease in a person’s working capacity and activity; - migraines and other headaches caused by abnormalities in the activity of blood vessels; - difficulty breathing, including those caused by asthmatic manifestations, a number of lung diseases, colds and infectious lesions of the body; - caffeine is often prescribed to relieve cough; - rehabilitation after surgical interventions using general anesthesia; - after eye surgery with retinal detachment. The main effect of caffeine is a psychostimulating effect. Without its participation, the activity of the respiratory and vasomotor center of the medulla oblongata is impossible. Thus, the working activity of a person during the day is also regulated, which causes such great love.