The Skin is naturally acidic with a pH values ranging from 4.0 to 6.0 and averaging around 5.5. This is to enhance the barrier function and reduce entry of harmful bacteria while allowing natural bacterial colonies that protect the skin to thrive.
Throughout our life the skin pH fluctuates within this range sometimes being overacidic and in some instances drifting towards less acidic. There's a tenfold difference between each pH value so a shift from 5.5 to 4.5 is more acidic than the number denotes.
Natural interventions to restore pH balance include the usual suspects: Good sleep, plenty of hydration, balanced diet, stopping smoking, use of neutral moisturizers all help. The key ingredient that helps to prevent wrinkles and skin aging from high acidity are naturally occuring Alpha-Hydroxy Acids. These help to reduce signs of aging an keep skin fresh at the right concentrations. These chemical compounds are found in many skin care products and can also be naturally derived from Apples, tomatoes, yogurt, citrus fruit and grape wine.
There are many products that claim to contain AHA's but without proven benefits in the concentrations they say. Dermatologists use AHAs in chemical peels and skin restorants.Eating fresh fruit, natural organic yogurt and drinkign water is our best bet.