No research has been done on the effects of shiitake mushrooms in water, and it is recommended that cooked shiitake mushrooms be consumed. It is not recommended to drink uncooked shiitake mushrooms in water because although the nutritional value of shiitake mushrooms is relatively high, soaking shiitake mushrooms in water does not fully release the nutrients of shiitake mushrooms, but only releases a small amount of water-soluble substances such as water-soluble vitamins and polysaccharides into the water. When mushrooms are soaked in cold water, the ribose disintegrating enzyme in mushrooms is not easy to be analyzed, and mushrooms may deteriorate after soaking for a long time, leading to the growth of bacteria, which may damage your health after drinking. If you want to drink shiitake water, you can cook with shiitake mushrooms and drink clean water soaked with shiitake mushrooms; you can drink soup made with shiitake mushrooms; or you can directly use clean water soaked with shiitake mushrooms to make soup.