Caffeine is the most widely available legal psychoactive stimulant drug. Also known as theine, methyltheobromine and trimethylxanthine, this xanthine alkaloid is not only found in coffee beans, but also in guaranine that is derived from guarana, mateine derived from mate, theine which is found in various teas and the kola nut, which is the base flavor of various Cola soft drinks. It stimulates the central nervous system, where it restores alertness and wards off drowsiness. Caffeine is also know to display certain diuretic properties, is an ergogenic, an atagonist of the adenosine receptors, and a cAMP levels increasing factor. It seems that caffeine helps prevent the onset of Parkinson’s disease and in the long run lowers the possibility of developing a heart disease.

Green Tea Extract- Camellia sinensis, or more commonly the tea plant is a genus of flowering plants which is generally being used to produce tea, including green tea, oolong, black tea, white tea and pu-erh tea, also called Bolay tea. The different oxidation process makes the final difference. Tea plants can grow out into a tree, but are generally pruned to allow for easy hand picking. While camellia sinensis is being cultivated all around the globe in tropical and subtropical regions, this South and Southeast Asian native is most popular when imported from India and China. Medical uses of tea stem from the traditional Chinese medicine, where it was used as a bronchodilator and to treat angina pectoris, coronary artery disease and peripheral vascular diseases. Green tea extract is used as appetite suppressant and thermogenesis increasing agent.

Guarana is a South American climbing plant belonging to the genus of trees and shrubs called Maple. This plant is common around the Amazon and very present in Brazil. The fruit of the guarana plant is being used in that country to produce a diversity of soft drinks and beverages, having the double caffeine content of the coffee bean. Other nutrients that are contained in the seed besides caffeine are protein, fat and starch, but also adenine, choline, guanine, resin, tannin and xanthine, just to name a few. The cognitive effects of guarana are well documented, but the appetite suppressant qualities of guarana are relatively new. A study has proven that a combination of yerba mate, guarana and damiana leads to a tenfold weight loss quantity when compared with a placebo.

Kola Nut, bitter brown seed that contains caffeine. Once used to make cola soft drinks, Kola Nut has been replaced by artificial flavourings in most beverages.

Methylxanthines (Caffeine) is a naturally occurring stimulant. Active ingredients of cocoa, coffee, cola and tea - caffeine, theobromine and theophylline fall under this group. It relaxes bronchial muscles, dilates the constricted airways, relieves congestion and stimulates diuresis. They get properly absorbed and evenly distributed in the body. Methylxanthine is mostly prescribed for people suffering from chronic obstructive pulmonary disease (COPD) having serious breathing problems persistently, despite of using inhaled anticholinergic and inhaled beta2-agonist. However it is not given top priority while treating COPD because it is known to cause side-effects. Headache, stomach upset, insomnia, heartburn, rapid breathing and rapid heart rate are some of the side effects experienced by people who have taken methylxanthine. Nevertheless, these side effects can be reduced by staying away from caffeine.

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.