On the theme of "all things in moderation"... green beans are actually slightly toxic. I think you'd have to eat a lot before it became a problem, though, e.g. green smoothies loaded with green beans on a regular basis.

• Full blog post at "Pollanesque".
• Appropedia's "green beans" page: Mildly toxic when raw. (If you can improve it, click edit on that ( Read more... )