Why Is Ceramide Important for the Skin Barrier?

Ceramide is a lipid produced by the body in the skin, acting like the "cement" that holds skin cells together. It makes up about 50% of all the lipids in the outermost layer of the skin (Stratum Corneum). Ceramide is therefore a key component of the skin barrier, which helps lock in moisture and protect against irritants. When ceramide levels fall, skin becomes dry, sensitive, and more prone to inflammation. In this article, a dermatologist explains why ceramide matters and how to choose products correctly.

What does skin low in ceramide look like?

When the ceramide in the skin decreases, the skin barrier weakens and several symptoms appear. The causes and symptoms commonly seen include:

• Causes of reduced ceramide: Prolonged sun exposure, using the wrong type of skincare, or having a skin condition such as atopic dermatitis can all reduce ceramide.

• Common symptoms: Very dry skin, easy irritation, a stinging sensation, or scaling.

• Consequences: When the skin barrier is weak, the skin loses water easily and is more likely to become inflamed repeatedly.

How to choose products containing ceramide

Choosing ceramide products appropriately can help restore the skin barrier well. Tips for choosing include:

• Look for the type of ceramide: Choose products that list Ceramide 1, 3, 6-II or Ceramide NP, AP, EOS, which are the types most commonly found in human skin.

• Helpful supporting ingredients: A good product should contain ceramide together with Cholesterol, Fatty Acids, and Peptides, which help strengthen the skin barrier.

• Who it suits: Suitable for people with atopic dermatitis (Atopic Dermatitis), because their skin often has less ceramide than normal.

• General use: Creams or lotions with ceramide as a main ingredient can be used on all skin types, especially dry skin, thin skin, and skin that has undergone medical treatment.

Frequently asked questions

Is ceramide suitable for oily skin? Yes. Ceramide helps strengthen the skin barrier without making skin oilier, so people with oily skin can use it too. Choose a light texture and use it together with products suited to your skin type.

Does ceramide really help with atopic dermatitis? Yes. People with atopic dermatitis often have less ceramide in the skin than normal. Using products containing ceramide helps replenish the skin barrier and reduce dryness, but it should be used together with the treatment prescribed by your doctor.

Can ceramide be used with other ingredients? Yes. Ceramide works well when used together with Cholesterol, Fatty Acids, and moisturizing ingredients such as Hyaluronic Acid, which support the skin barrier more completely.

How often should ceramide be used? It can be used every day, especially after cleansing and after bathing while the skin is still damp, to help lock in moisture and continuously restore the skin barrier.

Ceramide is a fundamental ingredient that is important for skin health and the skin barrier. If you have chronic dry skin, sensitive skin, or atopic dermatitis, consult a dermatologist at Siam Dermatology, tel. +66 61 448 7000 or LINE @siamderm.

Written by Dr. Patara Voravutinon, Dermatologist · Last reviewed July 16, 2026