What is it?

Caffeine acts as a stimulant by activating the central nervous system (CNS). It can counteract tiredness and improve concentration and focus. However, ingesting caffeine in high doses may lead to harmful effects on health. Side effects of consuming more than 400 mg of caffeine per day include:
- a fast heartbeat
- anxiety
- agitation
- restlessness
- sleeping problems
- tremors

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