PetzUp Lingzhi Formula for Aging Dogs is a Chinese herbal supplement scientifically formulated for old and aging dogs. It contains Lingzhi Polysaccharides which can promote metabolism, eliminate free radicals inside the dog´s body and regulate canines´ bodily functions. The accumulation of free radicals will damage the body cells and accelerate the aging process. The Lingzhi Polysaccharides act by inhibiting the growth of these damaging free radicals, thereby restoring the internal system and slowing down the aging process.