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Energy drinks have the effects caffeine and sugar provide, but there is little or no evidence that the wide variety of other ingredients have any effect. [3] Most of the effects of energy drinks on cognitive performance, such as increased attention and reaction speed, are primarily due to the presence of caffeine. [4]
A functional beverage is a conventional liquid food marketed to highlight specific product ingredients or supposed health effects. [1] [2]Beverages marketed as "functional" include dairy drinks, sports and performance drinks, energy drinks, ready-to-drink teas, kombucha, "smart" drinks, fortified fruit drinks, plant milks, and enhanced water.
While commonly in the form of dietary supplements, nutraceuticals or energy drinks, [2] some nootropic compounds are prescription and non-prescription drugs in various countries. In the United States, nootropics are commonly advertised with unproven claims of effectiveness for improving cognition.
The following is a notable list of energy drinks, with a few coffee variants, and some soft drinks such as Coca-Cola, Mountain Dew, and Pepsi listed for comparison, and marked in a different color. The caffeine content in coffee and tea varies, depending on how the coffee beans were roasted, among other factors.
Beverages containing caffeine include coffee, tea, soft drinks ("colas"), energy drinks, other beverages. According to a 2020 study in the United States, coffee is the major source of caffeine intake in middle-aged adults, while soft drinks and tea are the major sources in adolescents. [ 8 ]
Products containing caffeine include coffee, tea, soft drinks ("colas"), energy drinks, other beverages, chocolate, [239] caffeine tablets, other oral products, and inhalation products. According to a 2020 study in the United States, coffee is the major source of caffeine intake in middle-aged adults, while soft drinks and tea are the major ...
Whereas most energy drinks are sold in cans or bottles, energy shots are usually sold in 50ml bottles. Energy shots can contain the same total amount of caffeine, vitamins or other functional ingredients as their larger versions, and may be considered concentrated forms of energy drinks. [1] "Micro shot" energy drinks also exist, containing ...
The content of brewed beverages such as coffee and tea varies greatly based on the method of preparation. [18] There is no standard value for "a cup of coffee." The caffeine content of cola drinks and most energy drinks can be difficult to determine, because in many cases the labels do not indicate the dose per serving.