Ceramides

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What Are Ceramides in Skincare?

Ceramides are waxy lipids that, together with cholesterol and free fatty acids, fill the spaces between the cells of the skin's outer layer (the stratum corneum). They act like the mortar between bricks, slowing water loss and keeping the surface smooth, soft and comfortable. Skincare ceramides are made to match the skin's own, and they are added to moisturizers, serums and cleansers to support a healthy-looking skin barrier.

Ceramides Quick Facts

Property Details
INCI names Ceramide NP (formerly ceramide 3), Ceramide AP (6-II), Ceramide EOP (1), Ceramide NS, Ceramide AS, Ceramide NG; also phytosphingosine (a ceramide building block)
Common names Ceramides, skin-identical ceramides, phytoceramides (plant-derived)
Source Mostly made by yeast fermentation or synthesis to match human skin ceramides; plant versions come from wheat, rice or konjac
Form Pure ceramides are white, waxy powders; many suppliers sell them pre-dissolved in oil or water-dispersible blends
Solubility Pure ceramides are oil loving and hard to dissolve; pre-solubilized grades are sold as oil-soluble or water-soluble
Typical usage rate Depends on the form (Spec-Chem catalogue, supplier data): pure Ceramide NP 0.01-0.3%; pre-dissolved Ceramide NP 0.5-10%; multi-ceramide blends 0.5-8% (water soluble) or 1-30% (oil soluble)
Skin types All skin types; especially dry, mature, sensitive-feeling and winter-stressed skin

How Ceramides Work on the Skin

The skin's outer layer holds water thanks to two systems: humectants inside the cells, such as the natural moisturizing factor, and a layered lipid film between them. Ceramides are a main part of that lipid film. When ceramides run low, water escapes faster (higher transepidermal water loss, or TEWL), and skin looks dry, rough and dull.

Ceramide levels change with age and weather. Rogers and colleagues (1996) measured lipids from the face, hands and legs of women in different age groups and seasons. All major lipid classes fell with age, ceramides most of all, and lipid levels at all three sites were clearly lower in winter than in spring or summer. That helps explain why mature skin and winter skin feel drier.

The ratio of lipids matters as much as the amount. Zettersten and colleagues (1997) applied 2% mixtures of ceramides, cholesterol and free fatty acids to skin after a tape-strip test. In aged mice and in older people (about 80 years old), a cholesterol-dominant mix sped barrier recovery at 6 hours, while a mix dominated by fatty acids slowed it in mice. The lesson for formulators: pair ceramides with cholesterol and fatty acids rather than using one lipid alone.

Finished ceramide creams have been tested in people. In a split-leg study, Draelos and colleagues (2020) had women with dry legs use a ceramide cream for 4 weeks; ceramide, cholesterol and fatty acid levels in the outer layer rose and skin hydration improved. Spada, Barnes and Greive (2018) reported that a ceramide-containing cream raised hydration over 24 hours after one application, more than three reference moisturizers at 24 hours, and lowered TEWL. Both studies were run by brand-affiliated teams, so read them as product data.

How to Use Ceramides in Formulas

  • Choose the form first: pure ceramide powder needs heat and the right solvents to dissolve and can recrystallize if handled wrong. Pre-dissolved grades and blends are far easier for small-batch makers.
  • Rate: use the top of the supplier range for your grade. For example, a pre-dissolved Ceramide NP is used at up to 10%, while pure Ceramide NP is used at 0.01-0.3% (Spec-Chem, supplier data).
  • When to add: pure ceramides go into the heated oil phase, melted fully with the other oils at the temperature on the supplier sheet. Pre-dissolved and water-dispersible grades usually go in at cool-down; follow the sheet.
  • Build a lipid trio: include cholesterol and a fatty acid (such as stearic or linoleic acid) alongside ceramides, roughly in the skin's own balance.
  • Pairing: combine with humectants such as glycerin and hyaluronic acid, and with niacinamide. Ceramides play well with retinol and exfoliating acids, and they help offset dryness from both.
  • Storage: keep raw ceramides sealed, cool and dry; finished products last for the base's normal shelf life.

For a full routine built around barrier care, see how to strengthen your skin barrier.

Who Ceramides Suit

Ceramides suit nearly everyone. They are most useful for dry, mature, dehydrated or easily irritated-looking skin, for skin using retinol or acids, and for anyone in a cold, dry climate or winter season. Oily skin can use them too, in light lotions and gels.

Sensitive skin: ceramides themselves are skin-identical and rarely bother skin, but the rest of a formula can. Patch test any new product on the inner arm for 24 hours, and if you are blending your own, start at the lowest rate of your supplier's range and work up.

Frequently Asked Questions

What do ceramides do for your skin?

Ceramides help hold the skin's outer layer together and slow water loss. Skin with enough ceramides looks smoother, softer and less dry, and in studies ceramide creams improved hydration and lowered transepidermal water loss.

Are ceramides good for mature skin?

Yes. Rogers and colleagues found that ceramides decline more than other skin lipids with age, and a cholesterol-dominant lipid mix sped barrier recovery in people around 80 years old.

How often can you use ceramides?

Every day, morning and night. Ceramides are skin-identical lipids, so daily use in a moisturizer is the normal way to use them.

Do ceramides have side effects?

Ceramides themselves are very well tolerated. Reactions usually come from other ingredients in a formula, such as fragrance, so patch test new products for 24 hours.

Can I use ceramides with retinol or vitamin C?

Yes. Ceramides pair well with retinol, vitamin C, niacinamide and exfoliating acids, and they help the look of dryness that strong actives can cause.

Ceramides vs hyaluronic acid: which do I need?

Often both. Hyaluronic acid is a humectant that pulls water into the skin, while ceramides are lipids that help keep that water from escaping.

What percentage of ceramides should be in a product?

It depends on the form. Supplier data puts pure Ceramide NP at 0.01-0.3%, while pre-dissolved ceramide grades and multi-ceramide blends are used at 0.5-30% because they are diluted.

Shop This Collection at Skin Perfection

This collection groups the Ultimate Moisturizer, Uplift Eye Cream and the Haloxyl Eye Peptide Booster for dry, mature skin routines. Check each product page for its full ingredient list.

Sources

  • Rogers J, Harding C, Mayo A, Banks J, Rawlings A. Stratum corneum lipids: the effect of ageing and the seasons. Arch Dermatol Res. 1996;288:765-770. doi:10.1007/BF02505294
  • Zettersten EM, Ghadially R, Feingold KR, Crumrine D, Elias PM. Optimal ratios of topical stratum corneum lipids improve barrier recovery in chronologically aged skin. J Am Acad Dermatol. 1997;37(3 Pt 1):403-408. PubMed 9308554
  • Draelos ZD, Baalbaki NH, Cook S, Raab S, Colon G. The effect of a ceramide-containing product on stratum corneum lipid levels in dry legs. J Drugs Dermatol. 2020;19(4):372-376. doi:10.36849/JDD.2020.4796
  • Spada F, Barnes TM, Greive KA. Skin hydration is significantly increased by a cream formulated to mimic the skin's own natural moisturizing systems. Clin Cosmet Investig Dermatol. 2018. DOAJ record
  • Spec-Chem, Ingredients Catalogue 2026 V1: Ceramide NP and SpecKare ceramide blends, dosage ranges (supplier data).

These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure, or prevent any disease.

About the Author
Written by Kari Thomas, cosmetic formulator and founder of Skin Perfection.