As one who fervently believes you can never have too many medicinal mushrooms, I was anxious to try Agarikon - a mushroom species I was unfamiliar with. Each capsule provides 300mg of pure Agarikon, sourced through hot-water extraction. The recommended dosage is 4 capsules per day, making this a one-month's supply. But if you're like me, and also take other medicinal mushrooms like reishi, cordyceps, turkey tail, etc, I suggest taking half the recommended dose, which when combined with others, is sure to have a cumulative effect on your overall immunity. And bonus points to Longevity Botanicals for NOT adding ANY fillers whatsoever - I really wish more nootropic manufacturers would get with the program!