According to an extended scientific review on the influence of nuts on brain health and its functioning, walnuts turned out to be the best for your brain!
Although the effect of the other nuts, such as almond, hazelnut, macadamia, pistachio, pecan, pine nut, brazil nut and cashew, on the brain was less consistent, they all seem to have a positive influence on people with a higher risk of brain problems.
Curious? HERE is the source