Very interesting! I searched online after reading and found out on the potatoes, it was a study done on pigs on the starch of the potatoes...however it was RAW potatoes (humans don't eat them raw). When cooked, the starch we eat passes the small intestine (where the raw potatoes starch gets used differently) where it ferments. They mentioned something about cold cooked potatoes...no idea about that!
For the peanuts, there was some talk about how they also contained Resveratrol (like red grapes) which is used to prevent platelet accumulation.
Not saying the above is definite, it's all I could find at midnight :)
Haven't heard about peanuts and potatoes but have been told that okra helps raise red cells.
I've heard about the peanuts (yes, they have to have the skins on) but not about potatoes. I don't know if I read it in one of those alternative health columns or if there was actual studies done about peanuts and health. If they're salted, you've got another problem though.