Is it convenient to talk at the moment? buy tricorn hat uk In China, mushrooms are regarded as a symbol of longevity and have long been used to boost immunity. The shiitake mushroom especially is packed with coumarin (a naturally occurring chemical compound), and sterols (a group of chemical compounds like cholesterol), in addition to essential vitamins and minerals that enhance immune functions. And thereâs more! Shiitake is considered to help lower cholesterol levels, regulate blood sugar, treat infections, assist in the prevention of heart disease, and give some support for cancer prevention.