Caffeine tablets as a dietary supplement for athletes or in everyday life for an increased ability to concentrate. 

Caffeine is a natural alkaloid that occurs in many plant species. It has various effects on the body. These include, for example, improved concentration and the reduction of fatigue symptoms. In addition, caffeine stimulates the central nervous system, causes vasoconstriction and results in an increase in blood pressure. Caffeine is very popular with many people because it has a stimulating effect on the body and therefore makes us feel perky. The alkaloid is mainly found in coffee but also in tea, cola, energy drinks and chocolate. An overdose can cause sleep disorders, headaches, nervousness or gastrointestinal complaints. However, these symptoms usually do not occur with regular consumption, as the body can safely get used to the increased caffeine concentration. Pregnant women should avoid or at least limit consumption, as the oxygen supply to the placenta is reduced by caffeine and the growth of the child can be impaired as a result.