20:1 Extract - The Most Potent On The Australian MarketIMMUNITY | ENERGY | MOOD "KING OF THE MUSHROOMS" Chaga contains an array of biologically active nutrients that are famous for stimulating the immune system and reducing inflammation. Research has revealed that Chaga can stimulate the growth of leukocytes, which are a main line of defense in our immune system and reducing TNF-alpha, one of our body's primary drivers of inflammation.