Acid Mantle
Acid Mantle — a thin, slightly acidic film of sebum, sweat, and other secretions on the skin's surface that helps defend against microbes and environmental stress. Its mildly acidic pH supports barrier enzymes and a balanced microbiome.
Key points
- The acid mantle typically sits at a slightly acidic pH, generally around 4.5 to 5.5.
- It is formed from a blend of sebum, sweat, and byproducts of skin cell turnover.
- A healthy acidic pH supports the enzymes involved in maintaining the skin barrier.
- Highly alkaline soaps and over-cleansing can temporarily disrupt the acid mantle.
Frequently asked
What is the acid mantle's job?
It forms a slightly acidic protective film that helps limit the growth of unwanted microbes and supports the enzymes that keep the barrier healthy.
Do high-pH cleansers harm the acid mantle?
Alkaline cleansers can temporarily raise skin pH and disrupt the acid mantle, so pH-balanced products are often preferred for regular use.
Related topics
This is a foundational entry in the SYNC Skin Encyclopedia and is expanded over time. Educational information only — not medical advice.
