10 papers analyzed
These studies suggest that a daily caffeine intake of up to 400 mg is generally safe for healthy adults, while children and reproductive-aged women should limit their intake.
Caffeine is one of the most widely consumed psychoactive substances globally, found in various beverages and foods. Given its prevalence, understanding the safe levels of caffeine intake is crucial for public health. This synthesis examines the safety of consuming 400 mg of caffeine per day based on multiple research studies.
Safety for Healthy Adults:
Reproductive-Aged Women and Pregnancy:
Children and Adolescents:
Performance and Mental Health:
Cultural and Regional Variations:
Exceeding Safe Limits:
The consensus across multiple studies indicates that a daily caffeine intake of up to 400 mg is safe for healthy adults. However, specific subgroups such as reproductive-aged women, pregnant women, and children should adhere to lower limits to avoid potential health risks. While moderate caffeine consumption can offer performance benefits, exceeding the recommended limits can lead to adverse effects, highlighting the importance of mindful consumption.
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