The Chaga tincture has really been a game changer for my health. It has improved my immune system without having any detox reactions or any stimulating effects. As someone with a sensitive system, I don't like feeling anything when I take a supplement. This is my deal supplement, the only thing I feel is just better and better in the following days. I've watched a lot of David's videos and he said Chaga is basically hypoallergenic and even babies can take it. That gave me greater peace of mind that I would probably do ok with this supplement. I've had issues with other types of mushrooms, but never a problem with Chaga. It's the king of the mushrooms for a reason.