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Hi Perry and Randy, you guys rock!
I need serious clarity on pH.All things considered, if the pH of my water is a 7 and my shampoo bottle says the shampoo inside is between 4.5 – 5.5, what is the pH of my hair when I rinse it with the same water? Who is boss here or does it fall somewhere between the two pH levels?TIAMad love for the podcast.Mad love right back at ya!
Here’s the short answer: Don’t worry about it. Your shampoo and conditioner should be slightly acidic so they can deposit conditioning agents on your hair. Now here’s the long answer….Technically speaking, hair itself doesn’t have a pH. Instead it has what is known as an “isoionic point” which is the point at which the hair has an equal number of positive and negative charges. (In other words, it has a net zero charge.) The isotonic point of hair is about 5.6.What does all this mean? When the hair is surrounded by “stuff” (water, shampoo, conditioner, etc) that has a pH close to the isotonic point (5.6) then the hair has no net charge. No charge means there is no static electrical buildup up so fibers don’t repel each other and there is no flyway.Products with a very high pH can swell the hair shaft which is damaging. Products with a slightly positive pH can aid in depositing the “goodies” that smooth and soften hair.I hope this helps!
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