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I have a little collection of AHA products now, and since I also have a bunch of pH strips lying around at home, I thought it’d be a good idea to test all the pHs out, since they’re pretty important when it comes to choosing an AHA, and companies rarely state what they are.
If you can’t remember, this post explains why the pH of AHA products is important.
Neutrogena Pore Refining Toner (reviewed previously) – pH 3-4. I’m kicking myself for not writing down the percentage of glycolic acid in the product when I asked a Neutrogena rep, but I remember it being effective.
Dr Lewinn’s Purifying Toner – pH ~4.This has an unknown concentration of glycolic acid, but it’s listed below phenoxyethanol and sorbic acid, two preservatives that are generally used at very low percentages (<3%), so I would assume it’s not a great product if you’re looking for an AHA exfoliant.
Paula’s Choice 8% AHA Gel – pH 3-4, 8% glycolic acid.
Neostrata Gel Plus (reviewed previously) – pH ~4, 15% glycolic acid. Because the % is so high, it can get away with a slightly higher pH and still be effective.
John Plunkett Glyco Peel – pH 3-4, 25% glycolic acid. The most concentrated glycolic acid in my stash. With the low pH and high %, it’s not a product for the uninitiated!