Hey SJLC,
White potatoes, white rice, and some other goodies per the Jaminets are considered safe b/c they digest to glucose right away, instead of hanging around and fermenting in your gut. I've been able to eat both russet potatoes and white rice. I always bake my potatoes, and I eat them right away and on their own (hours apart from other foods). If you allow them to cool at all, some of the starch turns to so-called resistant starch, and that stuff will hang around in your gut (and thus the AS monster will have more time to find it!). I've started to flare when I've eaten potatoes that have cooled. I also notice that I flare if I eat the potatoes too close to bedtime, so I try to finish them at least 3 hours before sleep.
I've been eating more potatoes than rice over the past two months, but am now experimenting with the latter to see how I do...
