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lower-pH soap is harsher than pure soap
Is this article credible? It seems against common sense, and I’d never seen it cited before.
https://www.jidonline.org/article/S0022-202X(15)49627-7/pdfAlthough practices like superfat with fatty acid or bring down pH directly with acid or leaving part of the fatty acids unneutralized aren’t really backed up by science.
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