Make sure u take it with distilled water. I buy arrowhead distilled water from safeway. I buy food grade hydrogen peroxide 17% on ebay and i buy glass droppers on ebay.
If ur serious about oxygen therapy i suggest reading "flood your body with oxygen" by ed mcgabe. There is a ton of free ebooks u can download online:
1.the truth about food grade hydrogen peroxide
2.hydrogen peroxide medical miracle