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 increases energy expenditure and affects fat oxidation, which therefore promotes weight loss by increasing the body's metabolism.

L-Tyrosine is an amino acid taken to enhance the functions of the thyroid gland. It provides essential supplements to the body for fighting serious ailments. L-Tyrosine is a natural cure mainly for hypothyroidism and many other illnesses including protection of skin from the UV rays and depression. People suffering from hypothyroidism lack tyrosine and therefore do not respond to iodine supplements. Iodine supplements are of no use without tyrosine. Using L-tyrosine replaces vital amino acids which people having hypothyroidism lack. It produces thyroid hormones namely, norepinephrine, dopamine and epinephrine. L-tyrosine must be used by those who have a family history of under active thyroids and by those who have not got benefits from dieting efforts. L-tyrosine is taken in doses of 500mg 2 to 3 times everyday. People having high blood pressure must be cautious while taking this supplement.

Magnesium is the chemical element found in the periodic table with the atomic number 12. This alkaline earth metal is one of ten most common elements in the known universe and also very prominently present in the human body. It manipulates polyphosphate compounds, most prominently the DNA, RNA and the ATP. Numerous enzymes rely on magnesium ions to function properly. Most common application of magnesium in medicine may be the addition to antacids and laxatives. This metal is not found as a free element naturally on Earth, generally the metal is obtained through electrolysis of magnesium salts. The most common deficiency in the United States with staggering two thirds of the population is the magnesium deficiency. Magnesium can be obtained through vegetables, tea, cocoa, cereals, coffee, nuts and spices.

Phenylalanine- (S) alpha Amino beta phenylpropionic acid, or L-Phenylalanine, is an essential, electrically neutral amino acid, one of the twenty amino acids that are used by the human body to create proteins. L-Phenylalanine can also be turned into L-Tyrosine, also an amino acid, which converts into L-DOPA, a precursor to catecholamines like epinephrine, norepinephrine and dopamine. While it is naturally found in breast milk and also milk of mammals, it is also a component of the artificial sweetener aspartame, found in many diet soft drinks. Other sources of phenylalanine include beef, poultry, pork, seafood, sesame seeds, soy milk, walnuts, flax seed, cottage cheese and asparagus. Although widely available through food, L-Phenylalanine is also marketed as a supplement, particularly for body builders where muscle growth is the main factor.

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.

Vitamin B6, also known as Pyridoxine, Vitamin B6 is an essential vitamin to aid in the formation of healthy red blood cells and supports more vital bodily functions than any other vitamin. A water-soluble vitamin, Vitamin B6 is needed to release energy from the food we eat. Vitamin B6 cannot be stored in the body, so it must be obtained daily from either food or supplements. Vitamin B6’s role as a coenzyme involved in the metabolism of carbohydrates, fats, and proteins is what makes it important for dieters. Vitamin B6 is also responsible for the manufacture of hormones, red blood cells, neurotransmitters, enzymes, and prostaglandins. Vitamin B6 is required for the production of seratonin, a brain neurotransmitter that controls mood, appetite, sleep patterns, and sensitivity to pain. For weight loss, dieters should include vitamin B6 to increase their metabolism while rounding out a healthy diet.

Vitamin C- The essential nutrient L-ascorbic acid, or rather Vitamin C, is necessary for a wide plethora of metabolic reactions in almost all living beings. In humans, Vitamin C is vital in the collagen synthesis. While most beings are able to make it internally, apes and humans cannot. Interestingly enough, while widely promoted as the best dietary source of Vitamin C, Oranges are dwarfed by the Kakadu plum, which has sixty times the amount. Prominent are rose hips, blackcurrant, red peppers, parsley, the kiwifruit, broccoli, redcurrant, several berries including strawberries and raspberries, as well as more exotic fruits and vegetables like Camu Camu, acerola, seabuckthorn, Indian gooseberry, jujube, guava and baobab. Tomatoes, while very popular Vitamin C source in the US, are very low on the Vitamin C scale.

Yohimbe- Basically a tree bark, Yohimbe is rich in pharmacologically active chemicals. It is commonly found in products developed for body building and enhancing male performance. The use of Yohimbe causes serious side effects too that include renal failure, seizures and in very rare cases, even death. Individuals suffering from low blood pressure, heart disease, liver or kidney disease, and diabetes should refrain from using any kind of Yohimbe supplements. Taking larger doses of Yohimbe can cause weakness, stomach disorders, fatigue, and nervous stimulation followed by paralysis. It is therefore important to avoid self-medication. Sometimes, side effects may arise even if small amounts of this supplement are taken, especially for prolonged periods. If you are already taking drugs for treating some health condition, it is best to avoid this supplement.