Black Tea: Black tea contains caffeine and is a widely consumed caffeinated beverage. The caffeine content can vary based on the type and brewing time.
Green Tea: Green tea also contains caffeine, although generally in lower amounts compared to black tea. It provides a more moderate caffeine boost.
Energy Drinks: Energy drinks are highly caffeinated beverages that often contain additional stimulants, providing a strong and immediate energy boost.
Dark Chocolate: Dark chocolate contains caffeine along with other stimulants like theobromine. The caffeine content varies depending on the cocoa content.
Soft Drinks: Certain soft drinks, such as colas, contain caffeine. The caffeine content can vary depending on the brand and type of soda.
Matcha: Matcha is a powdered form of green tea and has higher caffeine levels than regular green tea due to the consumption of the entire tea leaf.
Yerba Mate: Yerba mate is a traditional South American beverage that contains naturally occurring caffeine, providing a mild stimulant effect.
Certain Medications and Supplements: Some medications and supplements, such as certain pain relievers, weight loss pills, and pre-workout supplements, may contain caffeine as an active ingredient.