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The world's primary source of caffeine is the coffee "bean" (the seed of the coffee plant), from which coffee is brewed.Caffeine content in coffee varies widely depending on the type of coffee bean and the method of preparation used; [9] even beans within a given bush can show variations in concentration.
The dry coffee grounds contain significant amounts of potassium (11.7 g/kg), nitrogen (27.9 g/kg), magnesium (1.9 g/kg), and phosphorus (1.8 g/kg). [5] The quantity of caffeine remaining in used coffee grounds is around 48% of that in fresh coffee grounds. [6] There are significantly less tannins in used coffee grounds than fresh coffee grounds ...
Caffeine is the world's most widely consumed psychoactive drug. [20] [21] Unlike most other psychoactive substances, caffeine remains largely unregulated and legal in nearly all parts of the world. Caffeine is also an outlier as its use is seen as socially acceptable in most cultures with it even being encouraged.
194.194 g·mol −1 Appearance Odorless, white needles or powder Density: 1.23 g/cm 3, solid [1] Melting point: 227 to 228 °C (441 to 442 °F; 500 to 501 K) (anhydrous) 234 to 235 °C (453 to 455 °F; 507 to 508 K) (monohydrate) Boiling point: 178 °C (352 °F; 451 K) (sublimation)
This suggests that caffeine production is an adaptive trait in coffee and plant evolution. The fruit and leaves also contain caffeine, and can be used to make coffee cherry tea and coffee-leaf tea. The fruit is also used in many brands of soft drink as well as pre-packaged teas. [14] [15] [16] [17]
In July 2023, a European variant was launched that adhered to European and Norwegian consumer standards and regulations. Prime Energy remained banned from sales as it contains 579 mg of caffeine per litre, which is above the Norwegian legal limit of 320 mg, but in 2024 a variant with reduced caffeine content became available in Norwegian stores ...
Caffeine (mg/US fl oz) Caffeine per serving (quantity) Additional notes 5-hour Energy: 3,504 104 200 mg (1.93 fl oz or 57.1 mL) AMP Energy (UK) 310 9.17 155 mg (500 mL) Released in the UK in 2013 under the Mountain Dew brand and was only available in 500 mL cans. It contained a higher caffeine content compared to Mountain Dew AMP. Bacchus-F ...
The caffeine content of instant coffee is generally less than that of brewed coffee. One study comparing various home-prepared samples came to the result that regular instant coffee (not decaffeinated) has a median caffeine content of 66 mg per cup (range 29–117 mg per cup), with a median cup size of 225 ml (range 170–285 ml) and a caffeine ...