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And every one of the AT held at the pH 7.3 was visibly damaged compared to with less than half of the quality. So if you're looking at a pH scale, if you're going up a pH scale, the scale is divided into 14 segments. Once you get to the fourth, up to about 14, that's extreme alkalinity. So about 7 is neutral. So you go down the other way, getting closer to zero, that's getting into acidity.