2. Suggestion: Children's half-life of caffeine metabolism will be prolonged because of incomplete liver and kidney development and poor detoxification ability, so generally speaking, children under 12 need to ban caffeine intake;
3. Children under 5 years old, including 5 years old, can't drink alcohol, and drink as little as possible over 5 years old. Coffee contains caffeine, which will lead to mental retardation of children;
Research shows that drinking coffee will aggravate heart disease and high blood pressure. Adults' daily intake of caffeine must be controlled within 200 mg, that is, they should not drink more than 3 cups of coffee every day, and they should never give coffee to their children.