I've researched soaking pistachios and pine nuts using various sources and unfortunately, I kept getting conflicting information or more specifically, some sources said soak, others said not to soak.
So I had this recipe for vegan raw lasagna which gave instructions to soak the pine nuts for one hour (most likely to soften them) but not the pistachios. I was a little uneasy about it but decided not to soak. I made the recipe (sampled a few pistachios alone during the preparation process) and ate my meal last night with no problems. Although, now that I think about it, my tummy did start to feel a little odd late in the evening, very gassy to be specific.
This morning, let's just say I was late to work because I couldn't safely pry myself from the toilet.
So I guess this should serve as confirmation that raw pistachios SHOULD be soaked or is it possible that it was something else? Other than the pistachios and pine nuts, I did not eat anything out of the ordinary yesterday.