Hey Steve,
I have found walnuts, brazil and pine nuts to be the safest. Walnuts also have the "good oil". I eat them all the time.
Almonds some have issue with... LaMonty (Ted) who could even eat brown rice on LSD had to be careful with almonds. In States I seemed to be able to eat almonds without much issue, down here... I need to eat in moderation.
Pistachio nuts I love... a lot of salt, I found my blood pressure went up as I was eating too many. I think for early dieters... may be a bit too starchy. I started eating only after couple of years... but they are addicting

Tim