Thanks for those links - very enlightening. So OH- can be a free radical - but the 2nd link makes clear that it can also be an ion. So which OH- are we getting when we add drops of sodium hydroxide or potassium hydroxide to our water? My bet is we are getting the ionic form - at least while it's still in the bottle. Is it known that OH- can end up as a free radical once its covalent bond with Na or K is broken, or after it's injested by the body?
So I guess it's best to hold off on the Alkalife pH drops - at least until my knowledge is further refined. It would make it all the more of a rip-off if the Alkalife company is selling tiny $30 bottles of a free-radical forming substance! (I've already said that they are charging a highly-inflated price for the same active ingredient used in drain cleaners and hair-perms. And drain cleaners and hair-relaxing kits are a lot cheaper by the ounce than this "patented" Alkalife bottle...)