I've said it once and I'll say it again: tilapia are not fish, they are a science experiment, and no self-respecting angler should ever eat one. But now science is saying not only are these "fish" tasty and nutritious, collagen from their skin will help that cut you just got by hastily slicing open a pack of bacon (to give your tilapia some flavor) heal faster. I'm not well versed in what's going on in the medical world, but per this story from Sciencealert.com, pig and cow collagen has been used for many years to aid in skin regeneration. It has a few down notes, though, such the chance you'll contract hoof-and-mouth disease. There are smart folks out there using soy bean extracts and algae extracts to create topicals that help skin heal faster, too. But according to the research cited in this story, the collagen from tilapia skin is better—and far safer—than all of the above.