I get packs of mixed seeds and nuts plus unshelled peanuts (monkey nuts) and walnuts from my Co-op. The seeds are pumpkin and sunflower plus pine nuts. I think these are all good for me. The nuts are almond, cashew and hazel, which I think are all good, and brazil, which I've heard you can overdose on whatever it is brazils have got in them (technical term). Walnuts are good.
I roast all the seeds and nuts at 150 degC until they start to brown. I've heard a higher temperature is bad. They're nice and crisp if you keep them in an airtight container.
I shell the peanuts (bit of a chore) and roast them for a bit longer.
I feel they all provide good fat and make an excellent snack. I also put them in my magic porridge groats and anything else I fancy.
Not very scientific but I'm sure someone will put me right.
PS No, not salted peanuts or nuts treated or added to in any way.
PPS I eat a lot of fat (calories) and have just bought some 32" waist jeans -- the only pair of my trousers that stay up without a belt