Brewer's yeast, a by-product of beer production, has been used as a nutritional supplement for centuries. It is rich in B vitamins, minerals, proteins and fiber, offering a variety of health benefits.

Here’s everything you need to know about the cheesy, nutty, dairy-free staple: what’s in it, where to find it, its health benefits, and how to use it in your cooking.

Simply dissolve two tablespoons of brewer’s yeast powder or one cube in warm water, creating a compress to hold on the lengths. Dr. Berg Nutritionals. Premium Nutritional Yeast Flakes. $32.