How does it work?
Caffeine is a purine alkaloid found naturally in tea, coffee, cola nut, cacao and guarana. Roasting or fermenting these products releases the caffeine to have the desired effect once consumed.1 Caffeine is a central nervous system stimulant causing increased heart rate and systolic blood pressure, reduced appetite, mental alertness and muscle stimulation.2 It has also been shown to have some effect on lipolysis (fat breakdown) and increased energy performance.3
What results can be expected?
Caffeine temporarily increases mental alertness, increased energy and may assist weight loss by boosting metabolism and fat burning when in conjunction with kilojoule control and increased exercise.4
1 Pengelly, A. (2004). The Constituents of Medicinal Plants (2nd ed.). Crows Nest: Allen and Unwin pp154.
2 WebMD. (2009). Vitamins and Supplements - Caffeine. Retrieved January 2014, from WebMD: http://www.webmd.com/vitamins-supplements/ingredientmono-979-CAFFEINE.aspx?activeIngredientId=979&activeIngredientName=CAFFEINE
3 Acheson, K. (2004). Metabolic effects of caffeine in humans: lipid oxidation or futile cycling? Am J Clin Nutr, 79(1), 40-46. Retrieved January 2014, from http://ajcn.nutrition.org/content/79/1/40.full
4 WebMD. (2009). Vitamins and Supplements - Caffeine. Retrieved January 2014, from WebMD: http://www.webmd.com/vitamins-supplements/ingredientmono-979-CAFFEINE.aspx?activeIngredientId=979&activeIngredientName=CAFFEINE