Wheat is the third most used crop in the world after rice and corn. Historically wheat is different to what is most commonly used today. Ancient forms of wheat are still around and have been making a bit of a comeback as they tend to be better tolerated by those intolerant to modern wheat products. Some of these forms are Spelt, Kamut and Farro. These ancient grains are harder to grow and harvest, as yields are smaller and the husks are an effort to remove. Modern forms have been bred to combat these issues.