Coffee may do more than help you feel awake. A growing number of studies suggest that moderate coffee drinking is linked to a longer life and a lower risk of several major diseases, including heart disease, stroke and Type 2 diabetes. For many adults, the biggest benefits appear around three to five cups a day.
In one study, people with serious mental health conditions who drank three to four cups daily had longer telomeres, a marker of slower biological aging. Their telomere length looked similar to that of people about five years younger. Another large review found that about three and a half cups a day was linked to the lowest risk of death. Both regular and decaf coffee showed benefits, suggesting that antioxidants and anti-inflammatory compounds — not just caffeine — may play a role.
Long-term research in women also found that drinking caffeinated coffee in midlife was linked to better “healthy aging,” meaning fewer chronic diseases and less physical or mental decline later on. These studies show associations, not cause and effect, but they point to a consistent pattern. For most people, moderate coffee intake may support long-term health, while too much caffeine, added sugar or personal sensitivity can reduce the benefit.
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