Caffeine-related effects

Caffeine in green tea extract may cause insomnia, anxiety, jitteriness, irritability, and rapid heartbeat, especially in sensitive individuals or at high doses. These are due to stimulation of the nervous system.

Green tea extract, due to its caffeine content, can induce a range of stimulant-related side effects in susceptible individuals. These effects manifest as insomnia (difficulty sleeping), anxiety, heightened irritability, jitteriness (restlessness and shakiness), and an elevated or rapid heartbeat (palpitations). The intensity of these symptoms is generally dose-dependent, meaning they are more pronounced at higher dosages of green tea extract. Individuals with a known sensitivity or intolerance to caffeine are particularly prone to experiencing these adverse effects. The effects are due to the stimulating effect of caffeine on the central nervous system and cardiovascular system.