I didn't realize how confusing green beans and even peas could be!
I typically just avoid them and go for healthier options, but for those of you that like green beans/peas let me give you a couple of tips:
(1) Eat them fresh, meaning NOT dried.
(2) Do not eat them if they are hard on your stomach (gastrointestinal side effects).
I found a great post from marksdailyapple.com that touches on this subject here.
Thanks for the questions!