http://www.beanogas.com/About_Problem.aspx

Beans aren't the only food that can cause a problem. I buy this:
http://www.enzymedica.com/products/Digest_Gold

As for chili, each batch is unique, like Garilia said, expressing your mood.

Here's a summertime tip: Use an old 9 x 13 pan, and make chili on your gas grill. Works perfect.