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ColaDrink
MatchaDrinkGuaranáDrinkPre-workout (supplement)Supplement
CacaoFood
Instant coffeeDrinkL-Theanine (supplement)SupplementOolong teaDrinkHojicha (roasted green tea)DrinkEnergy drinkDrink
Yerba mateDrinkMilk chocolateFoodCoffeeDrinkBlack teaDrinkGreen tea extract (EGCG)SupplementGreen teaDrinkEspressoDrinkHot chocolate / cocoaDrinkCold brew / iced coffeeDrinkEnergy gel (carb gel)SupplementWhite teaDrinkEnergy tonic drink (taurine tonic)DrinkDark chocolateFood
Caffeine
Established research area
A stimulant found in tea, coffee, and cacao. One of the most studied compounds; commonly discussed in relation to alertness, and — when taken later in the day — sleep.
Often discussed in relation to
Commonly noted
- Commonly noted
- Caffeine is a bitter stimulant that occurs naturally in more than 60 plants, including coffee beans, tea leaves, kola nuts, and cacao pods, and is also added to some drinks and medicines.
- Higher intake
- High caffeine intake is commonly discussed in relation to restlessness, a fast heart rate, and trouble sleeping; MedlinePlus notes that up to 400 mg a day is not harmful for most healthy adults, while sensitivity varies from person to person.
Source: MedlinePlus
Foods and products containing it
ColaDrinkMatchaDrinkGuaranáDrinkPre-workout (supplement)SupplementCacaoFoodInstant coffeeDrinkL-Theanine (supplement)SupplementOolong teaDrinkHojicha (roasted green tea)DrinkEnergy drinkDrinkYerba mateDrinkMilk chocolateFoodCoffeeDrinkBlack teaDrinkGreen tea extract (EGCG)SupplementGreen teaDrinkEspressoDrinkHot chocolate / cocoaDrinkCold brew / iced coffeeDrinkEnergy gel (carb gel)SupplementWhite teaDrinkEnergy tonic drink (taurine tonic)DrinkDark chocolateFoodOften considered alongside
References
- NIH / NLM PubChem: Caffeine
Reference for the substance’s identity. This does not establish a health benefit or a product’s composition.