ETA:6 Great video! I agree with the trichologist in that conditioning shampoos do cause build-up. That is why clarifying with a clarifier without build-up causing ingredients is best, in my opinion. Conditioning shampoos are best used as alternate shampoos, again, in my opinion. When one of my friends a while back started to get ETA:8 excessive build-up - from conditioning shampoos, I suggested switching to a shampoo for normal hair, to wash out some of it gradually, and conditioner for normal hair too, and it helped. Clarifying is faster and more complete.
ETA:7 Conditioner only washing has caused problems for some but not all, as per reports. The latter may be down to how often one clarifies. All conditioners cause build-up.
The average skin pH, according to this,
http://www.ncbi.nlm.nih.gov/pubmed/18489300, is about 4.7.
However, there is a variation among inviduals. The range I was given when checking with cosmetic companies is on average 5.5-6.5 for pH values of a line, or still acidic.
ETA:5 More on pH and bacteria, recommending a pH of about 5.5,
http://content.karger.com/ProdukteDB...name=94670.pdf
Most shampoos and all conditioners these days are acidic, including baby shampoos. Neutral pH shampoos usually indicate that on the label.
ETA:3. The exceptions would be soap based shampoos and soap based shampoo bars. All true soaps are alkaline with a pH range of about 9 -10. That is why vinegar rinses are ususally recommended after using them, as acidic rinses, like vinegar, citric acid and lemon juice are more acidic than the average conditioner.
Some shampoos for coloured hair have pH values in the lower range, closer to pH 4, to compensate for raised or roughened cuticles, due to chemical processing.
Well diluted lemon juice or vinegar rinses are often helpful too, for hard water issues. ETA:4 Club soda, with a buffered pH of about 5 can also be used for hard water, to help remove mineral deposits, used undiluted and straight from the bottle or can, without the need of using it flat.
ETA: Human newborn skin has a near neutral pH,
http://content.karger.com/ProdukteDB...rtikelNr=66140.
ETA:2 Baby shampoo pH for Johnson's,
http://forums.longhaircommunity.com/...&postcount=631
It is good to have all of this in one place. I have posted this before in different threads.
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