All fruits are good for beard growth as they contain vitamins and minerals that are essential for overall health. But the best fruits for beard growth are probably oranges, which contain a high amount of fructose. Fructose reduces the levels of SHBG in the body. SHBG is a protein that binds to testosterone and makes it unavailable for use. So, by reducing SHBG levels, oranges make more testosterone available for beard growth.