Northland Triple Extract Chaga is a - Step 1 - 120 day, 190 proof alcohol extraction. Step 2 - 24 hour low heat water extraction. Step 3 - A rapid freeze method that fractures more cell walls, followed by another 24 hour low heat water extraction. I believe by doing this third extraction we are getting a better end product. We harvest chaga from older live birch trees in the pristine woods of northern Minnesota. We take great care in not harming the trees we harvest from. This is a 4 oz. dropper bottle that should last you about 40 days. Take two 1/3 dropper squirts in your favorite beverage twice a day. Here's to your health and happiness !!!