Caffeine, a central nervous system stimulant used in Drinks That Work Upshot as an aid to stay awake, for mental alertness due to fatigue or, in combination with other ingredients for pain relief, and as a power and energy accelerate. Caffeine is available alone as a non-prescription drug over the counter medication, in combination with other non-prescription drugs, and in prescription drug combinations for relief of pain and headache. Like Ephedra, caffeine acts to increase mental alertness while providing additional energy for weight loss and exercise training. Caffeine is more than a stimulant as it goes deep into muscles to provide long lasting power while delaying the onset of muscle fatigue. Also great before working out, caffeine fights fatigue and helps you get ready for your workout. For dieters feeling sluggish that need just a little something extra to get them through the day, caffeine is the obvious no-calorie stimulant solution. Many products containing caffeine anhydrous contain as much caffeine as one or two cups of coffee. It is recommended to limit the use of caffeine containing medications, foods, or beverages while taking caffeine supplements as excess caffeine intake may cause nervousness, irritability, sleeplessness and occasional rapid heart beat.

Green Tea Extract is utilized to increase fat metabolism as well as aide in weight loss and weight loss management.

Guarana, a stimulant derived from the seeds of the Brazilian Guarana plant. Guarana is used to increase alertness and help fight fatigue. It contains caffeine and is usually associated with an "energy crash" several hours after taking a large dose.

Kola Nut- The trees found in Africa have seed pods that are inherent with Kola nuts. In regions of western Africa and central Africa, Kola nut trees are commonly found and they tend to grow up to 18 meters in height which is a good 60 feet. Kola nut consists of caffeine and has acts as a powerful anti depressant and stimulant. Kola nuts importance has been realized mainly in western Africa. It is also useful in reducing indigestion, hunger and fatigue. In simple words, it functions as an aphrodisiac. According to tradition, Kola nuts are offered when someone enters their new house and it symbolizes hospitality and friendship. Kola nut can be easily found as there are several street vendors selling them at places such as the bus or train station.

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- 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.