There are far too many things that ee eat claimed to have antiaging properties, including nuts.
I don't know if that actually can be proven and how it's measured.
However, I think that all nuts are healthy and should be involved in our diet on daily basis but for some there are some restrictions because if you eat too much of them they could even harm you. I think that brasilian nuts are im that category
When it comes to aging, I belieive that the great deal is in our genetics.