Is Cognitive Health good for cognitive function?

Yes — the evidence for this is strong. This topic has unusually strong randomized-trial evidence for a behavioral field: the landmark FINGER trial (Lancet, 2015) showed a 2-year multidomain intervention combining diet, exercise, cognitive training and vascular risk management improved cognitive function in at-risk older adults, with benefit holding regardless of baseline characteristics, and this has now been extended by the large US POINTER randomized trial (JAMA, 2025) comparing structured and self-guided versions of the same approach. That's reflected in an evidence score of 87/100 for its role in cognitive function, drawn from 11 studies (3 RCTs), with an estimated impact on longevity rated substantial (81/100).