pH is an important consideration when purchasing skin care products. For example, if a product is acidic, it can increase cellular exfoliation. But if it is too acidic, it can be harsh, drying, or even irritating for the skin. On the other hand, if a product is basic, it can disrupt skin’s natural acid mantle, causing irritation, drying, redness, or infection.
AminoGenesis products are formulated to be a pH between 5.5 and 6.0 — the optimal pH for healthy skin.
WHAT is “pH”?
pH is measured on a scale from 0 to 14, with 7 representing neutrality. Anything below 7 is acidic, anything above is alkaline. The further away you are from 7, the stronger the alkalinity or acidity of the solution is. An example of a very strong acid is sulfuric acid, and an example of a very strong alkali is lye (sodium hydroxide).
The Skin’s Normal pH
If it is alkaline (or neutral): the stratum corneum (uppermost layer of the skin) is disrupted, damaging the barrier function of the skin, which translates into skin dryness and decreased antibacterial defense. A study has shown that using a skin cleanser that is basic – alkaline – like regular soap, can cause this kind of damage even after one use, and the effect is cumulative, meaning it gets worse with repeated use. These effects will of course be more pronounced in people suffering from dermatitis, people who have sensitive skin, and in the elderly, as this subgroup already has some damage going on, and their skin’s ability to fight these assaults is suboptimal.(3)
Acids and bases have differing effects on the skin. In general, a product that is mildly acidic to neutral is best for your skin.
To get the greatest efficacy from your skin care and to maintain pH:
1.) Always follow the instructions. Do not leave skin care products on longer than intended. Some of the ingredients are water-soluble and can react with the humidity in the air, becoming more or less potent over time.
2.) Store skin care in a cool, dark place. Adjustments to pH can occur with misuse over time.
1- W. Joachim et al. Stratum corneum pH: Formation and Function of the Acid Mantle. Exogenous Dermatology 2002; 1(4):163-75.
2- N. Schurer, M. Bock. Lowering Lesional Surface pH in Acne: A New Treatment Modality for Herpifix.Journal of Dermatological Treatment 2009; 20(1): 27-31.
3- L. Baranda et al. Correlation between pH and Irritant Effect of Cleansers Marketed for Dry Skin.International Journal of Dermatology 2002; 42: 494-9.