Can't even begin to thank Batch enough!! He's probably saved many lives with his d-3 regiment. I am 65 now and my clusters started in my 30's. Took forever to get diagnosed and then they gave me prednisone which after taking the headaches came back. Tried it all and when I first saw Batch with his vitamin regimen I laughed and thought he was nuts, but I was willing to try anything at that point. Lo and behold in less than a week the headaches subsided and went away. Can't thank Batch enough for what he has done for me and other sufferers. By the way I am episodic... Not chronic.