Is Coffee Good or Bad for Longevity?

For many, coffee is life. But is it longevity-friendly? The answer lies in the dose, the timing, and your genes. Emerging studies show that coffee may reduce risk of chronic disease, support metabolic health, and even influence DNA methylation. But overdo it—or consume it at the wrong time—and it could impact sleep, stress hormones, and inflammation. This article takes a science-first look at coffee’s complex role in biological aging, and how to enjoy it in a way that works with your body, not against it. Spoiler: your cup of joe might be doing more good than you think.