I've been taking barley grass for quite some time and I can indeed say it helps. From my understanding, the red blood cells carry 10x as much oxygen at a pH of 7.4 than they do at a pH of 7.2. Since barley juice powder contains alkalizing nutrients, then it can help raise your blood pH levels. It can be hard to find a good barley green powder so make sure to look for one that is organic and cold-processed. i don't wanna promote a specific brand cuz there are a lot of good ones out there, but you can use a website like http://www.barleysupplements.com/ to find a good one. Best of luck and let us know how it turned out for you!