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Cola
MatchaGuaranáPre-workout (supplement)
Cacao
Instant coffeeL-Theanine (supplement)Oolong teaHojicha (roasted green tea)Energy drink
Yerba mateMilk chocolateCoffeeBlack teaGreen tea extract (EGCG)Green teaEspressoHot chocolate / cocoaCold brew / iced coffeeEnergy gel (carb gel)White teaEnergy tonic drink (taurine tonic)Dark chocolate
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
Commonly found in
ColaMatchaGuaranáPre-workout (supplement)CacaoInstant coffeeL-Theanine (supplement)Oolong teaHojicha (roasted green tea)Energy drinkYerba mateMilk chocolateCoffeeBlack teaGreen tea extract (EGCG)Green teaEspressoHot chocolate / cocoaCold brew / iced coffeeEnergy gel (carb gel)White teaEnergy tonic drink (taurine tonic)Dark chocolateFeelments is for personal tracking and general wellness education. It does not provide medical advice, diagnosis, or treatment.