Drinking 3 to 5 Cups of Coffee Daily May Extend Life and Cut Disease Risks

Coffee remains one of the most widely consumed drinks globally, with over 2 billion cups enjoyed daily. Recent research now suggests that moderate coffee drinking—around 3 to 5 cups a day—could boost longevity and lower the risk of serious illnesses like heart disease, diabetes, and some cancers.

A series of studies from 2023 and 2024 found that drinking 2 to 3 cups of caffeinated coffee daily (alongside 1 to 2 cups of tea) was linked to an 18% lower dementia risk over nearly 37 years. The same research showed reduced risks for type 2 diabetes (by up to 30%), Alzheimer's, Parkinson's, depression, and overall mortality. For healthy adults, benefits extended up to 4 to 7 cups, with the lowest mortality risk observed at about 3.5 cups per day. Both regular and decaf coffee showed similar effects.

The protective effects come from coffee's antioxidant and anti-inflammatory properties, which help shield cells from oxidative stress—a key factor in telomere shortening. One study even suggested that 3 to 4 cups daily could slow biological aging by 5 years in people with major psychiatric disorders. In the U.S., around two-thirds of adults drink coffee regularly, averaging 3 cups per day.

Additional findings from the Nurses' Health Study indicated that consistent coffee consumption may support healthier aging, particularly in women.

The latest evidence reinforces that moderate coffee intake—whether caffeinated or decaf—could play a role in disease prevention and longer life. With benefits ranging from heart health to cognitive protection, the drink's popularity aligns with its growing reputation as a health-supporting habit.