Have O2 and it doesn't seem to help still use it time and again over the past 10 years. Have not tried the D3 yet. Had the injections in the beginning until insurance changed and lost my co pay. Back in the day I was splitting them. It was real easy in the beginning because it was an actual syringe. Do have different insurance now should see about getting it again. I remember quantities were also a problem. Wish I would have found this site years ago. It's one of those things you don't understand unless your there.
Thanks all!