Which oxygen therapy are you speaking of? Ozone? What I have read ozone helps keep the side effects of chemo to a minimum, but don't know personally...About cell food, I have that and have just started using it this week. I am about 9 1/2 months pregnant and have been having trouble with my leg bones aching in spite of drinking kefir for calcium, taking trace minerals, and several prenatals. Since taking about 20-30 drops of the cellfood a day my mobility has improved a great deal and the aches decreased quite a bit! My dad said he felt better when he was taking the cell food too, so my guess is it is pretty good stuff. :) I've been impressed with how much it has been helping me.