Tremella Fuciformis, also known as the Silver Ear mushroom, but mostly known as the snow mushroom, is a staple ingredient in many Asian skincare and food products. Yang Guifei, one of Ancient China's Four Great Beauties, was known to have used it to maintain her youthful appearance. If it could do that back then, it should have no problem keeping your skin moisturized now.
Snow mushrooms are excellent at hydrating skin. This is due to their moist, gelatinous structure, as well as the large number of polysaccharides that resides in each one. Polysaccharides have a protective effect on the skin, practically acting as a barrier to keep in moisture.
Like hyaluronic acid, the snow mushroom hydrates the skin and helps it retain moisture. It can be applied directly to the skin or consumed as food. Indeed, this is why the mushroom shows up so often in Asian cuisine. It's even been referred to as a dessert, which means that you can moisturize your skin and have a sweet snack at the same time.
It's one of the highest food sources of vitamin D, which promotes cell growth. Unfortunately, your body's production of the vitamin decreases by about 75% between the ages of 20 to 70. Thus, you should make vitamin D a normal part of your diet.