A Scientific Fact: Sweat + Oil = Healthy Skin

The skin is an amazing magical organ. It's the body's largest organ. Please refer to my earlier blog about the basic structure and function of the skin, and then let's talk about the "acid mantle". 

What is the acid mantle? We have sweat (sudoriferous) glands and we have oil (sebaccous) glands and these glands work together to secrete a thin coat of oil (lipids) called the acid mantle, a very fine, slightly acidic film on the surface of the skin acting as a barrier to bacteria, viruses and other potential contaminants that might penetrate the skin. The pH of the skin is between 4.5 and 6.2, so it is acidic. The acid mantle is a protective layer, a barrier to disease and it also helps the skin maintain moisture and combat dehydration. The acid mantle kills bacteria and as a result, keeps bacteria out of skin cells. Keeping the acid mantle intact is essential to healthy happy skin.

But the multimillion dollar cosmetics industry, which is very ingredient driven, doesn't really want you to know this. Cosmetic companies want to define and control "beauty" because it's profitable to do so. They play into our insecurities and fears about skin tone, skin texture, and the holy grail of diminished beauty - aging. Cosmetic companies create and then capitalize on our fears and their target is women. Don't fall for it.

My nursing degree - actual science - taught me that the less we interfere with the body's own ability to achieve balance, the better. Less is best. Let the acid mantle do it's job.

It's a scientific fact that sweat + oil = healthy skin 

If the acid mantle is temporarily removed by the use of harsh soaps, products, chemical or sun damage, the skin becomes susceptible to rashes, breakouts and infection.

The acidity of the mantle is measured by its pH on a scale of 1 to 14. Healthy skin has a pH between 4.2 and 5.6. The pH can vary in different parts of the body and men generally have a slightly higher pH than women. Substances with a pH of below 7 are acids. Strong alkaline soaps, which have a high pH can destroy the acid mantle or alter its pH. If the acid mantle is stripped off of the skin, bacteria can attack and infection may occur. If the mantle is destroyed, it will replenish itself naturally over time, usually within two or three weeks. But your skin is left at risk during this time.

Prolonged skin issues such as acne, may be caused by an alkaline pH or an unstable acid mantle. When the skin’s pH is no longer acidic, bacteria can cause pimples. People prone to acne tend to reach for strong soaps, which make pH levels worse thus creating a skincare cycle that actually prolongs and causes more acne. Acne treatments that focus on restoring the skin’s pH to acidic levels can help alleviate breakouts.

How do we maintain a healthy acid mantle? Avoid harsh soaps, look for pH blanced skin care products, use sunscreen and stop constantly washing your face. C9SC’s Goats Milk Soap is a fantastic facial cleanser. The pH of goats milk is similar to our own skin, the naturally occurring lactic acid in the milk lifts those dead skin cells, and the milk fat makes the bar super emolliant - all without disrupting the awesome acid mantle.

All my best,

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My next order will definitely give goats milk soap a try! I have always had issues with breakouts-this sounds like something worth trying!


Very interesting, I use your goats milk soap for my daily facial cleanse and love the way it makes my skin feel – not dry after washing and I follow up with your serum. I agree the cosmetic industry is full of empty promises however consumers continue to spend obscene amounts of money each year hoping to find that magic potion in a bottle that will keep them looking younger.


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