Barrier Function: Your Skin’s Security Guard

Barrier Function - Your Skin's Security Guard

Ever spilt lemon juice on a cut?

Then you’ll agree with me when I say, it hurts like hell!

When acidic juice hits that nerve ending, you sure do know about it.

Well, this should give you some idea of how your barrier functions.

When your skin is chapped and flaky, it’s deficient in lovely lipids, and allows irritants like your lemon juice to penetrate easily.


The barrier function refers to the outer layer of your skin, which you can liken to a brick wall.

The CELLS are the BRICKS and holding these bricks in place are the MORTAR; an INTERCELLULAR MATRIX made up of complex materials (lipids), including ceramides, cholesterol and fatty acids.

It’s very impermeable; when your lovely barrier is intact, your skin looks healthy and radiant, irritants have difficulty penetrating, and your skin doesn’t lose water and become easily dehydrated.

But if your barrier is impaired, your skin can look out of whack, dull and sallow, causing dry skin.


  • Flaking is a sign of a dehydrated skin
  • Accentuated expression lines and wrinkles
  • Stinging, because irritants penetrate easily, causing inflammation in the nerve endings
  • Tightness is a sensation that occurs when the barrier is damaged
  • Redness is due to inflammation, the barrier is unable to protect against irritants that penetrate
  • Itchiness is classic barrier damage, when nerve endings are affected this causes itching, and when skin is scratched this causes further inflammation


  • Sun damage
  • Cold and heat
  • Over-exfoliation and peels
  • Over-cleansing or using harsh ingredients, which strip protective lipids from the barrier
  • An ageing skin; slowing of the cell renewal cycle, extrinsic damage from the sun, and inflammation upset the barrier function. Mature skin starts to produce less oil (sebum)


You sure can: In fact, improving your barrier function will help diffuse redness, burning, tingling, itching and dehydration, returning your skin back to a youthful, healthy glow.

Products that contain lipids, will help to supplement protective components of the barrier.

Using a good emollient moisturiser like Fortify Barrier Repair Cream will re-build and protect your barrier; layer it with a luscious serum like Bio Lipid Complex and you have a complete treatment, that will also help to restore your damaged lipid layer, through the cellular repair process.

Avoid foaming cleansers, which are designed with detergents to remove excess sebum, because dry, sensitive skin is thinner it generally has less sebum, and detergents remove lipids in the protective barrier. Instead opt for gentle oil cleansers to prevent outstripping the barrier, Miracle Cleanse is a great example of a formula that protects as it cleanses.

Avoid ingredients that enhance penetration, this includes acid based exfoliants and mechanical scrubs that contain beads that aren’t spherical, which can cause tiny micro tears in the skin.

Sun exposure also reduces lipids especially in inflamed skins, so be sure to wear a good sunscreen.

Follow the link to learn more about our fantastic barrier function.

6 thoughts on “Barrier Function: Your Skin’s Security Guard

  1. AI says:

    As a esthetician this is very informative..we want to create a relaxing environment but we also want to be educated and relay this to our clients with the treatments and after care..Soooooo appreciate your message…

  2. Anonymous says:

    All this time I thought I had a sensitive skin and used lots of products to counteract this which led to more flare ups but now I see i had an impaired barrier wow

  3. Anonymous says:

    I’m a dermatologist and often refer clients to your site and this wonderful article is one of the reasons why! keep up the excellent work please

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