Caffeine is of course a major component of every day drinks such as tea and coffee and is also included in Drinks That Work Upshot. It is claimed that over 70% of the American population take more than 300 milligrams daily. As well as in familiar drinks it is used in energy drinks such as Red Bull as well as in many over the counter analgesics and other medication. Medically it is a as trimethylxanthine, useful as a heart stimulant and it also works as a mild diuretic. It works in the same way as certain drugs, the amphetamines, cocaine, and heroin, all of which work on the action of the brain although in a milder way, and like them it is addictive.

Green Tea Extract is currently being promoted by the health conscious community as a weight loss product, which does not do this incredible concoction of helpful ingredients justice. Many green tea extracts nowadays exclude caffeine, to avoid the associated side effects and lower the ingestion of this legal addictive stimulant. The main characteristic of the green tea extract should be the antioxidative effect, which surpasses Vitamin C twentyfold. But the other traits are not to be forgotten, it is anti-inflammatory, anti-carcinogen and anti-radiation. The unique combination of green tea catechins, derivatives of apicatechin, and flavonoids, which belong to the same family, are proven scavengers of free radicals and an unavoidable addition to any dietary supplement combination, body building or weight loss as the target objective.

Guarana is not only a dietary supplement but also an energy booster as well as it has a high concentration of caffeine.

Kola Nut has a euphoric and stimulating effect on the heart and central nervous system and produces a heightened state of euphoria and well-being.

Methylxanthines (Caffeine) is basically a type of bronchodilator, methylxanthine is considered highly effective in the treatment of COPD. Due to its ability to relax the airways, it enables the patient to breathe more easily. For the same reason, it is believed to improve respiratory muscle strength when administered orally or intravenously. Caffeine, a widely used psychoactive substance, belongs to this group of compounds called as methylxanthines. Caffeine gives rise to number of neurological side effects such as anxiety, insomnia, restlessness, and tachycardia. On the other hand, low to moderate consumption of caffeine can lead to positive effects such as enhanced alertness, energy and better concentration. Some people may experience withdrawal symptoms after about 12 to 24 hours after sudden cessation of caffeine consumption while some individuals may report of such symptoms within 3 to 6 hours.

Theobromine, which is a mild diuretic and mild stimulant. Theobromine can be found in cocoa and chocolate products. Theobromine is most commonly used for its diuretic effect.

Theophylline is a drug which belongs to the xanthine family. These substances are aromatic in nature and consist of a purine ring which is substituted with different chemical groups at different carbon positions to form different compounds chemically. In case of theophylline the purine ring has one methyl group substituted at carbon number 1 and 3 and one oxygen atom substituted at carbon number 6 and 2. Theophylline was originally extracted from tea leaves and was initially used to increase the rate of urination (diuresis); later it found more uses as a drug because of its effects on the respiratory and circulatory systems. However, it has many side effects; therefore, presently it is prescribed quite judiciously.