The caffeine content of iced tea varies significantly depending on several factors, including the type of tea leaves used (black, green, white, etc.), the brewing method, and the serving size. A standard eight-ounce serving can contain anywhere from a negligible amount to upwards of 90 milligrams of caffeine. This range positions it between coffee, which typically contains more caffeine, and decaffeinated beverages.
Understanding the caffeine levels in beverages is crucial for managing intake and potential health impacts. Caffeine acts as a stimulant, affecting the central nervous system and potentially impacting sleep, anxiety levels, and heart rate. Knowing the approximate caffeine content allows individuals to make informed choices aligning with their dietary needs and sensitivities. Historically, tea has been consumed for its perceived health benefits and invigorating properties, which are partially attributed to its caffeine content. Today, it remains a popular beverage choice globally, highlighting the ongoing relevance of understanding its composition.