The immune system is more enhanced with the more beta glucan you take. With our highly potent Beta 1, 3-D Glucan the immune system is greatly enhanced when taken daily. How much you need is determined by body weight. We suggest you take 2 mg per kg. For example, a 220 lb. person weighs 100 kilograms and needs 200 mg of beta glucan (two 100 mg capsules) for effective immune support. For maximum immune support, take 20 mg per kg. We make a 500 mg capsule for maximum immune support.