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AHA: Directions for use recommendation and pH question

1) For the least irritating results, use a pea-sized amount for the entire face.

Differin recommends this amount, too, but I didn't realize it until I read the website (my dermatologist said "small amount," which can be misleading). Once I started using a pea-sized amount, I had virtually none of the irritation most people report, and my skin is so sensitive I can't even use Cetaphil. Applied the same of the AHA and have been equally stable.

2) Thank you for including the pH of the AHA in the product description on the website (4.0-4.1). What would happen if you lowered it? I noticed Paula Begoun's 8% AHA ranges in pH from 3.5-3.8. Since a lot of us have trouble maintaining an acidic barrier on our faces due to oiliness and sensitivity, would a pH of 3.5 make a difference over 4.0?

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