Key Takeaways

Caffeine peaks in your blood about 60 minutes after drinking it, and its effects are typically noticeable for four to six hours.

Caffeine has a half-life of two to 12 hours, which is affected by factors such as age, genetics, liver health, and pregnancy.

Drinking caffeine in moderation and at the right time of day can help you avoid unwanted side effects, such as trouble sleeping or feeling jittery.

Caffeine usually reaches peak levels in your blood about one hour after you drink it. Though this can vary from person to person, the effects of caffeine are typically noticeable for four to six hours after consumption, and its complete elimination from the body takes even longer.

How Long Does Caffeine Cause Symptoms?

The noticeable effects of caffeine typically last fo

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