Some call you a glutton, others, a survivalist. You have sampled the delicacies of every race and culture, suffered through the under cooked slime served in the greasiest tavern, and the maggot infested bread of a long journey at sea. Simply put, your stomach is iron clad, and you gain the following benefits:
You gain +1 con to a maximum of 20.
Whenever you consume anything that you can mechanically digest or drink, you regain 1 hit dice (on top of other effects) of HP.
You gain Resistance: poison
You have advantage against poison or disease effects from anything you eat or drink.