I also did some experimenting tonight.. And what I came to the realization was, 200 mg/ml is damn easy to pull off, 600mh/ml or higher is not, And you will never do it with 10% naoh, I spent several hours and did several batches until I got it down.. when you reach that concentration it does lose the watery consistency and start to get thicker, and it simply will not dissolve until you get it above a pH of 5, and 10% sodium hydroxide solution doesn't even touch it when it's that strong what you end up doing is adding so much of it, to bring the pH up that you end up watering the living f*** out of it and you lose your concentration completely. I did get the process down fairly well, you have to get The tip of a knife or something very small and put very tiny crystals of food grade sodium hydroxide in it while it's stirring and continuously check it with the pH meter, And that prevents you from watering the living f*** out of it and keeping your high concentration, I was able to get a perfect 7.0 pH and a completely clear solution at 600 or 700 mg/ ml.. honestly it might be higher, because I did slightly pass 7.0, so I added a little bit more glutathione to it to drop it back down, and settled on 6.8... you can pretty much play with it like that bringing it up or down with one or the other, but I basically got a perfectly clear solution just like I did with the L-Carnitine but way stronger and I'm pretty happy with the results. I'm glad I bought a couple pounds of food grade sodium hydroxide and not just a solution because I would have been fucked, My whole point in doing this was to get a high concentration like the pharmaceutical places are selling, not just 200mg. I don't know if this helps anybody but that's the best way I can explain it... I tried the baking soda method like he suggesting above several weeks ago and the only thing I ended up with was a bunch of wild ass fizzing and bubbling, And it actually made everything really cloudy, because the baking soda wouldn't dissolve.... It also had no effect on the pH which was what I was adding it for anyways... perhaps somebody else might have better luck with that but that's not something I want to try again I'm pretty satisfied with what I've figured out.