Composition, Properties, and Beneficial Effects of Functional Beverages on Human Health

Functional beverages comprise a special category of drinks free of alcohol that contain bioactive components from plant, animal, marine, or microorganism sources that contribute to the reinforcement of human health. Functional beverages are mainly divided into the following basic categories: (i) dairy-based beverages and (ii) non-dairy-based beverages. Functional beverages have several positive functional properties such as the rehydration of the body, recovery of lost energy, the increase of athletic performance, the prevention of pain in joints, the improvement of heart health, the improvement of immunity and the digestive system, and the creation of the feeling of satiety and boosting mood. However, according to health experts, there are also functional beverages that induce obesity and heart diseases because of their high content of sugars, sweeteners, and other components such as caffeine, taurine, taurine combined with caffeine, creatinine, etc. The scope of this review was to highlight the main components and the functional properties of energy drinks along with the effects of functional beverages on human health. Limited review articles address this overall hypothesis in the recent literature, thus comprising the significance of the current study.