Is Nuts good for longevity?

Yes — the evidence for this is strong. Nut consumption is supported by several large prospective cohorts, including the Nurses' Health Study, Adventist Health Study, and a Swedish national cohort, along with a systematic umbrella review, all showing associations between regular nut intake and lower cardiovascular disease risk and mortality. That's reflected in an evidence score of 72/100 for its role in longevity, drawn from 5 studies, with an estimated impact on longevity rated substantial (68/100).