I mix it up. Sometimes I take 3-4 capsules a day. I take the ones from fungi.com. I use other ones as well for immune system. I have gone without a cold all winter, so they could be helping with that. I have been studying more at work since taking them, but it's hard to say. I've also been motivated to learn more lately. I think I'd have to take them consistently for a few months, and then see how I feel going off of them. I'd really like to grow my own and eat them as I like to cook. I've been reading on how to do it.