“续命”还是“促癌”？喝咖啡也有最佳“黄金时段”

Core Viewpoint - Coffee is increasingly viewed as a "necessity" in daily life, with both stimulating effects and health benefits, but improper consumption can lead to adverse health outcomes [1][3] Group 1: Health Benefits of Coffee - Research indicates that drinking more than 2 cups of unsweetened coffee daily can reduce cancer risk by 5% and mortality risk by 11%, while sweetened coffee increases cancer risk by 6% and mortality risk by 25% [3][5] - Unsweetened coffee is rich in polyphenols and antioxidants, which help reduce chronic inflammation and cell damage, thereby lowering cancer risk [5][12] - Drinking more than 2 cups of unsweetened coffee daily can lower lung cancer incidence by 22% and mortality by 21% [5] Group 2: Optimal Consumption Timing - A study found that consuming coffee in the morning reduces cardiovascular disease mortality risk by 31% and overall mortality risk by 16% compared to those who drink coffee throughout the day [7][9] - The concept of a "coffee drinking time window" suggests that timing is crucial for maximizing health benefits [9] Group 3: Recommended Practices for Coffee Consumption - It is advised to prefer black coffee or Americano, avoiding added sugars or syrups to maximize health benefits [12] - The recommended daily intake is 2-3 cups (approximately 400-500 milliliters), depending on coffee strength [14] - Coffee should not be consumed at excessively high temperatures, as drinks above 65°C are classified as possibly carcinogenic [15] - Coffee should be viewed as a supplement to a healthy lifestyle rather than a cure-all for unhealthy habits [16][18]