Chapter II
REVIEW OF RELATED LITERATURE This chapter presents both foreign and local related literatures relevant to the study. This relevance is shown by the proponents in order to give more reason and understanding of the proposition.
Related Literature and Studies
Downsides in Caffeine
New research from John Hopkins Medical School shows that performance increases due to caffeine intake are the result of caffeine drinkers experiencing a short-term reversal of caffeine withdrawal. In essence, coming off caffeine reduces your cognitive performance and has a negative impact on your mood. Drinking caffeine triggers the release of adrenaline. When caffeine puts your brains and body into this hyper-aroused state, your emotions
After recovering from gastritis, Julio says, “I rarely drink it now, But when I do, under certain circumstances, I feel sluggish and hence may want to drink more. But I don’t.”

Soft Drinks’ Comparison to Energy Drinks Caffeine On average, energy drinks substantially contain more caffeine than soft drinks. The caffeine content of energy drinks ranges from about 50 to 300 mg in each 8 oz. serving, while caffeinated soft drinks typically have between 20 to 72 mg of caffeine in an average of 12 oz. serving, according to the Centers for Science in the Public Interest. Sugar The specific amount of sugar varies depending on the brandm most nondiet energy drinks contain between 20 to 30g of sugar per serving. Soft drinks, usually contain between 20 to 30g of sugar per serving. Other Ingredients Soft drinks consist mostly of carbonated water and sugar. The other ingredients of the beverage are designed to enhance the taste, color of the product or preserve the freshness of the beverage. Energy drinks typically include variety of supplemented ingredients designed to serve specific purposes. These supplemental ingredients may include B vitamins, tourine, carnitne, glucuron lactose, inositol, ginseng or guarana.
Purpose of Caffeine in Athletics There are many athletes that believe the substance can enhance their physical as well as mental performance. It is