Forget jade rollers and collagen powders, your most reliable longevity ritual might be the humble cup of coffee. A sweeping 30-year Harvard study has found that women who sip caffeinated coffee in midlife are more likely to age with vitality, both inside and out.

Researchers followed nearly 50,000 women, aged 45 to 60, from the iconic Nurses’ Health Study beginning in 1984. Their mission? To define “healthy aging”, not just years lived, but years lived well. That meant reaching 70 with mental clarity, physical strength, and freedom from chronic disease.