Bests & Worsts Reviews from Amazon

I used this as an oxygen source when I began my exercise/diet regime to cure my COPD. It was to be a safety net in case I needed an oxygen boost during my exercise sessions. It was great to have it, and I went through the first bottle (about 50 or more good gulps)in the first few weeks. The second one is still on my desk and I no longer need the boost. Also, it really does contain oxygen. I have a pulse oximeter that tells me the percentage of oxygen that is in my blood. When I take a Boost gulp this number quickly shoots up to a point I could not normally reach, what with the COPD lung damage. It comes back down in under a minute, but the boost was very effective and got me into normal breathing mode very quickly. I highly recommend this product and, no, I do not work for Boost.