<qa>  What was the outcome of a multi-site trial?A multi-site trial with 90 individuals aged 45-73 without dementia indicated that NF statistically improved executive function Trails B-A vs. placebo within 3 months, which increased further at 6 months. The placebo group demonstrated identical improvement in a 3-month open-label extension. Following NF withdrawal, participants returned to baseline; statistically-significant improvement was restored once NF was individuals resumed. 