Title/Year		Objectives	Results and conclusions
1	Effect of Caffeine on the Body―2015	The present work has as main objective to show medications with pure caffeine or in combinations and their analgesic effects, supplements for physical activities used by athletes, foods, and adverse effects on the central nervous system.	Caffeine has action in conjunction with the central nervous system, responsible for distributing and assisting in the effect of drugs and drugs distributed throughout the body.
2	Caffeine Consumption―2000	To evaluate values for the caffeine content in food products.	Some products in the UK and Denmark have higher caffeine content. Research data on caffeine consumption are limited. Based on product usage and available consumption data, the authors suggest an average daily caffeine intake for US consumers of 4 mg/kg.
3	Caffeine and Its Effects on Health―2018	Evaluation of the effects of caffeine on health. Magazine article.	Researchers show that caffeine not only stimulates the central nervous system but can also act on the body as a mild antidepressant, boosting the production of certain neurotransmitters (serotonin, dopamine, and noradrenaline) in the brain.
4	Major Compounds Profiles in Energetic Drinks: Caffeine, Taurine, Guarana, and Glucoronolactone―2006	This article presents a literature review about the most common components present in energy drinks: caffeine, taurine, guarana and glucuronolactone, with emphasis on Brazilian legislation, composition, action on the organism, toxicological and metabolic aspects.	Published research and studies show that there are still many divergences regarding the appropriate concentrations for the use of these components in the formulation of these beverages and that further studies are required on the interaction of these components with other substances such as alcohol, since energy drinks are often consumed mixed with alcoholic beverages in order to potentiate the effect of alcohol.
5	Coffee, Caffeine vs. Health Review of the Effects of Coffee Consumption on Health―2010	This article seeks to sensitize people in making a conscious decision regarding consumption.	The effects of caffeine are subject to the physiological and individual characteristics of the subject.
6	Influence of Caffeine on Blood Pressure and Platelet Aggregation Behavior―2000	Considering the high consumption in Brazil and in the world population of products containing caffeine in its composition, the authors proposed to observe the effects of this substance on the behavior of blood pressure and platelet aggregation.	Caffeine raises diastolic pressure in the acute phase, hypertensive effect that disappears with chronic use. The absence of alterations in platelet aggregation points to the need for studies with a greater number of participants and in a randomized way.
7	Ergogenic Effect of Caffeine on Performance in Medium and Long-Term Exercises―2005	To analyze the effects of caffeine on performance in medium and long term exercises.	The findings point to caffeine as an efficient ergogenic agent in medium and long-term exercise. The ergogenic effect of caffeine on performance has been evidenced after the acute intake of caffeine doses between 3 and 6 mg/kg body weight. However, it still does not seem clear what caffeine action mechanisms would be involved in improving performance in prolonged exercise
8	Cardiovascular Effects of Caffeine: Literature Review―2013	To review the literature on the effects on the cardiovascular system.	As shown in several studies, it is a fact that caffeine alters some of the factors that influence cardiovascular health, such as plasma homocysteine levels, serum cholesterol, heart rate, and blood pressure. However, the magnitude of these alterations, against a risk of cardiovascular death.