Caffeine is a central nervous system stimulant that temporarily wards off drowsiness and boosts alertness and energy.

Green Tea Extract is a widely consumed beverage in the world. It is well known for its antioxidant properties. It is traditionally used to treat ailments such as headaches, poor digestion, and body aches. Green tea extract is rich in catechin which increases the level of cholecystokinin that suppresses that appetite, thus promoting weight loss. It also contains Pheophytins, chlorophylls, caffeine, and carotenoids that have anti-genotoxic and antioxidant properties. It also helps in thermogenesis and in the metabolism of fat, promoting weight loss. The EGCG content protects the body from free radical damages. It also blocks the carcinogens that may cause cancer and protects the body from digestive and respiratory infections. It also has anti-bacterial properties.

Guarana- The active constituent of guarana is caffeine, which means that it should not be used alongside ephedrine as either a dietary aid or in order to stimulate performance. The American Food and Drug Administration has not tested its effectiveness or its purity as they do not class it as a drug. Guarana has many other names including Brazilian cocoa and may be a constituent of non alcoholic drinks imported from South America. Because of possible adverse reactions it is not recommended for anyone with a heart condition or who has kidney disease, high blood pressure or who suffers from anxiety.

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 Once used to make cola soft drinks, Kola Nut has been replaced by artificial flavourings in most beverages.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) are derived by the methylation of xanthine; an example is caffeine. These chemicals have a number of important effects on human physiology. They are diuretics, meaning that they increase urine excretion. They have nootropic effects because they increase memory and learning. Clinically they are used to ease the breathing process and they serve as a stimulant of cardiac muscles and the central nervous system. The chemicals bind to the heart muscles and mimic the effects of the hormone epinephrine, increasing ATP production and the energy available for heart muscle contraction. Their long term use can however impair long term memory.

Theobromine- The bitter alkaloid found in chocolate is known as theobromine. It comes from the cacoa plant and is found in chocolate as well as chocolate free foods that are consist of theobromine. Theobromine belongs to the methylxanthine class of chemical compounds. It is found in the leaves of the tea plant, the kola or cola nut and acai berries. No bromine is present in theobromine, despite the name. The properties of theobromine are that it is souluble in water, is crystalline, is a bitter powder, is listed as white or colorless in color. It is considered a lesser homologue because it has a lesser effect to caffeine. Theobromine is the kind of isomer which belongs to paraxanthine and theophylline at the same time. It is basically a xanthine having two methyl groups.

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.