November 2025

coffee

Is 45mg of caffeine a lot?

Is 45mg of caffeine a lot? The Mayo Clinic recommends the following daily limits of caffeine: Adults: less than 400 mg/day. Adolescents: less than 100 mg/day. Children: 0 mg/day. Caffeine has a half-life of about 5 hours. Someone who consumes 40 milligrams (mg) of caffeine will have 20 mg remaining in their system after 5

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