Impossible Foods’ big claim to fame is that there’s heme in its burgers. Well, here’s a shocker: This heme comes from soy leghemoglobin and contains more iron than that found in the heme of a similar serving of red meat. Having too much iron in your blood can mean a greater risk of developing cancer, especially for men and postmenopausal women. There’s no need to consume heme, since the body makes its own to be used in hemoglobin—which helps transport oxygen in red blood cells.
The Impossible Burger is also more than 50 percent fat, and most of that is saturated fat. In short, the Impossible Burger is probably the unhealthiest veggie burger on the market.