This is pumped full of anti-oxidants and vitamins. A dropper full is equal to 15 cups of green tea. I put it in my water and had at it. Unfortunately, the taste is odd. The more I drank the less I enjoyed it. It is much easier to drink when you put it in hot water. I'm not sure if it works but I'll tell you that I will be putting it in my mug when I feel a cold coming on. That's for sure.