Ceramides are lipids that make up a large part of the "mortar" between skin cells in the outer layer, helping keep water in and irritants out. Labels name them with letter codes — Ceramide NP, AP and EOP are among the most common.
The letters describe the ceramide's chemistry: the type of fatty acid (N, A or EO) and the base it's built on (P for phytosphingosine). Their different structures influence how they contribute to the organisation of the skin's lipid layers. A useful ceramide product isn't about one "best" type — it's about the overall formula, including partners like cholesterol and fatty acids. This guide decodes the labels and uses the L.A.B.E.L. Check.
This article is for educational purposes only. It does not constitute medical advice. See a dermatologist for eczema or persistent barrier problems. Last updated: 28 October 2026.
Ceramide NP, AP and EOP are different ceramide classes found in skin and used in skincare formulations. Their names describe their chemical structures. NP contains a non-hydroxy fatty acid and phytosphingosine, AP contains an alpha-hydroxy fatty acid and phytosphingosine, and EOP contains an esterified omega-hydroxy fatty acid and phytosphingosine. They contribute to the organisation of the skin's outer lipid layers. Rather than looking for one universally superior ceramide, consider the complete moisturiser formula, including cholesterol and free fatty acids.
- The letters are chemistry, not a quality ranking.
- Several ceramide types together better reflect skin's own mix.
- Cholesterol and fatty acids matter as much as ceramides.
- The whole formula — not one ingredient name — decides results.
- What are ceramides?
- How to read ceramide letter codes
- Ceramide NP vs AP vs EOP
- Old names: Ceramide 1, 3 and 6 II
- Why cholesterol and fatty acids matter
- How to read a ceramide label
- What does the research show?
- The L.A.B.E.L. Check
- Step-by-step: using ceramides in your routine
- Ceramides and Indian skin
- Illustrative case study
- Common myths
- Frequently asked questions
- Key takeaways
Ceramide NP. Ceramide AP. Ceramide EOP. Ceramide NS. If you've stared at a moisturiser label wondering what these codes mean, you're not alone. Decoding ceramides on labels helps you understand what a product contains — and what really matters for your skin barrier.
A commonly described pattern: someone chooses a moisturiser because it lists several ceramides on the front, but keeps washing with a harsh foaming cleanser twice a day. Their skin still feels tight and stings.
The number of ceramides on a label matters less than the whole routine and formula. This scenario is illustrative and does not describe a specific individual.
What Are Ceramides?
- Waxy lipids found in the stratum corneum, the skin's outermost layer.
- A major barrier lipid: ceramides make up a large share — roughly half by weight — of the lipids between skin cells, alongside cholesterol and free fatty acids.
- They form layered sheets (lamellae) that slow water loss and help keep irritants out.
- Many types exist: human skin contains numerous ceramide classes that differ in structure and chain length.
- Levels can drop: with age, harsh cleansing and in conditions such as atopic dermatitis.
In simple terms: if skin cells are bricks, ceramides are a key part of the mortar holding the wall together.
See the epidermis and barrier function.
How to Read Ceramide Letter Codes
Ceramide names describe two building blocks: the fatty acid and the sphingoid base.
| Letter | Part | Meaning |
|---|---|---|
| N | Fatty acid | Non-hydroxy fatty acid |
| A | Fatty acid | Alpha-hydroxy fatty acid (extra –OH near the start) |
| EO | Fatty acid | Esterified omega-hydroxy fatty acid (ultra-long chain linked to another fatty acid) |
| S | Base | Sphingosine |
| P | Base | Phytosphingosine |
| DS | Base | Dihydrosphingosine |
| H | Base | 6-hydroxysphingosine |
So NP = non-hydroxy fatty acid + phytosphingosine; NS = non-hydroxy fatty acid + sphingosine; EOS = esterified omega-hydroxy fatty acid + sphingosine.
In simple terms: the first letters tell you the "tail", the last letter tells you the "backbone".
Ceramide NP vs AP vs EOP
| Feature | Ceramide NP | Ceramide AP | Ceramide EOP |
|---|---|---|---|
| Fatty acid | Non-hydroxy | Alpha-hydroxy | Esterified omega-hydroxy (ultra-long) |
| Base | Phytosphingosine | Phytosphingosine | Phytosphingosine |
| Proposed role (skin lipid research) | Core building block of lipid layers | Extra hydroxyl may affect packing and water-binding | Skin lipid research suggests a structural role in organising lipid layers |
| Natural abundance | Relatively abundant class | Present in smaller amounts | Small amount, structurally important |
| Common in skincare | Very common | Common | Less common; harder to formulate |
Roles describe skin's natural lipid organisation; they are not guaranteed results from applying a cosmetic containing that ceramide, which depends on the full formula.
No single ceramide is "best". A blend of ceramide types, paired with cholesterol and fatty acids in a well-made formula, reflects skin's own lipid mix more closely than one ceramide name on the front of a pack.
Old Names: Ceramide 1, 3 and 6 II
- Ceramides were once numbered in the order they were identified.
- Ceramide 3 is generally associated with Ceramide NP.
- Ceramide 6 II is generally associated with Ceramide AP.
- Ceramide 1 has been used on cosmetic labels for an esterified omega-hydroxy ceramide such as EOP — in skin research, "Ceramide 1" usually refers to the sphingosine version (EOS).
- Why it changed: numbers became confusing as more types were found; letter codes describe structure directly.
Historical naming conventions differ across research and cosmetic sources, so old numbers aren't universally interchangeable with INCI names. The letter code is the more reliable guide.
Why Cholesterol and Fatty Acids Matter
- The barrier is a team: ceramides, cholesterol and free fatty acids together form the organised lipid layers.
- Balance matters: research on barrier repair found that applying all three lipids together, in suitable ratios, supported recovery better than some incomplete mixtures. Findings depend on the study conditions and ratios, so not every commercial formula containing all three will perform the same way.
- Look for: cholesterol, phytosphingosine and fatty acids such as linoleic, palmitic or stearic acid near ceramides on a label.
- Pseudo-ceramides and plant lipids: some products use ceramide-like synthetic molecules or plant-derived lipids, which can also support the barrier.
"A ceramide on a label is a word. A barrier is a recipe — ceramides, cholesterol and fatty acids, working together."
How to Read a Ceramide Label
- Find the ceramide names — Ceramide NP, AP, EOP, NS, EOS and so on.
- Note their position — with caution: ingredients above 1% are listed in descending order of concentration, but those at 1% or less may be listed in any order after them. Ceramides often sit in this lower group, so position alone can't reveal how much is present.
- Check for partners: cholesterol, phytosphingosine and fatty acids.
- Look at the base: fragrance-free, gentle formulas suit reactive skin.
- Don't count ceramides: "five ceramides" doesn't automatically beat a well-balanced formula with fewer.
Ingredient lists show what's present, not exactly how much — concentrations are usually not disclosed.
What Does the Research Show?
| Source | Type | Finding |
|---|---|---|
| Masukawa et al. — Ceramide species in skin (2008) | Lab analysis | Characterised the many ceramide species in human stratum corneum |
| Coderch et al. — Ceramides and skin function (2003) | Review | Summarises ceramide structure, roles and topical use |
| van Smeden & Bouwstra — Stratum corneum lipids (2016) | Review | Lipid composition and organisation in healthy skin and atopic dermatitis |
| Imokawa et al. — Ceramides in atopic dermatitis (1991) | Clinical study | Found decreased ceramide levels in atopic dermatitis skin |
| Man et al. — Physiological lipid mixtures (1996) | Experimental study | Balanced mixtures of ceramides, cholesterol and fatty acids supported barrier recovery |
| Draelos — Moisturizers (2018) | Review | Explains how barrier-repair moisturisers are formulated |
Head-to-head human studies comparing individual cosmetic ceramides (NP vs AP vs EOP) are limited.
The L.A.B.E.L. Check
To choose ceramide products wisely, the Boldpurity Science Team uses the L.A.B.E.L. Check — an original educational framework:
- L — Look for the letter codes: identify which ceramides are present.
- A — Assess the partners: cholesterol, phytosphingosine and fatty acids.
- B — Beware of front-of-pack counting: more ceramide names isn't automatically better.
- E — Evaluate the whole formula: fragrance, texture and other actives matter.
- L — Live it consistently: gentle cleansing and daily use matter more than any single ingredient.
The L.A.B.E.L. Check is an original Boldpurity Science Team teaching model.
Step-by-Step: Using Ceramides in Your Routine
These eight steps put the five L.A.B.E.L. principles into practice.
- Switch to a gentle cleanser — stripping cleansers undo barrier care.
- Use lukewarm water and pat skin dry.
- Apply a hydrating layer to slightly damp skin.
- Follow with a ceramide-containing moisturiser, ideally with cholesterol and fatty acids.
- Morning: finish with broad-spectrum sunscreen.
- Pair actives thoughtfully: ceramide moisturisers are commonly used alongside retinoids or acids to help comfort.
- Patch test new products, especially if your skin is reactive.
- Give it time: some people notice skin feels more comfortable over a few weeks of consistent use, though this depends on the formula and your skin.
See dehydrated oily skin and humectants vs occlusives.
Ceramides and Indian Skin
- North Indian winters: dry air and heaters increase barrier stress — richer ceramide creams can help.
- Humid summers: choose lighter ceramide gels or lotions instead of skipping moisturiser.
- Harsh face washes: frequent foaming cleansers can deplete barrier lipids.
- Air-conditioned offices: low humidity can leave skin tight by evening.
- Retinoid and acid users: barrier-support moisturisers help many people tolerate actives.
- Brown skin and irritation: a compromised barrier can mean more irritation and, in turn, dark marks — gentle barrier care helps limit this risk.
Illustrative Case Study
The example below is hypothetical and does not report measured results.
Profile: Age 33; started a retinoid; skin tight and stinging in winter; uses a foaming cleanser and a fragranced gel moisturiser.
L.A.B.E.L. plan: Switches to a gentle cleanser; adds a hydrating layer; chooses a fragrance-free moisturiser listing ceramides with cholesterol and fatty acids; spaces retinoid nights while skin settles.
Hypothetical outcome (illustrative only — not observed or measured results): In this scenario, skin may feel more comfortable over a few weeks. Lesson: the routine and the formula matter more than the ceramide count.
This guide was researched and prepared by the Boldpurity Science Team, distinguishing skin's natural lipid biology from cosmetic product performance, drawing on in-house formulation experience and published research on ceramide nomenclature, stratum corneum lipids, atopic dermatitis and barrier-repair lipid mixtures. The L.A.B.E.L. Check is an educational framework. The case study is hypothetical. We update articles when significant new evidence is published.
Common Myths About Ceramides
The number of ceramide names doesn't reveal amounts, ratios or how well the formula is built.
Fact: Balance and formulation matter more than the count.
Oil (sebum) and barrier lipids are different. Oily skin can still have a disrupted barrier, especially with harsh cleansing or actives.
Fact: Choose a lighter ceramide texture, not none.
Frequently Asked Questions About Ceramides
Ceramide NP vs AP vs EOP: Key Takeaways
Ceramide letter codes describe chemistry — the fatty acid and the base — not quality. Ceramide moisturisers are cosmetics: they support barrier comfort but don't treat or cure eczema. Use the L.A.B.E.L. Check — Look for the letter codes, Assess the partners, Beware of front-of-pack counting, Evaluate the whole formula, Live it consistently — and remember that a barrier is a recipe, not a single ingredient.
Understanding the epidermis and skin barrier · Humectants and occlusives explained · Why oily skin can still feel dehydrated · How to layer hydration
A water-light bubble toner serum (100 ml) designed for dryness and barrier support — an optional hydrating layer before your moisturiser. See the product page for its full ingredient list.
Explore AquaBlur™- Masukawa, Y., Narita, H., Shimizu, E., et al. (2008). Characterization of overall ceramide species in human stratum corneum. Journal of Lipid Research, 49(7), 1466–1476. PubMed
- Coderch, L., López, O., de la Maza, A., & Parra, J.L. (2003). Ceramides and skin function. American Journal of Clinical Dermatology, 4(2), 107–129. PubMed
- van Smeden, J., & Bouwstra, J.A. (2016). Stratum corneum lipids: their role for the skin barrier function in healthy subjects and atopic dermatitis patients. Current Problems in Dermatology, 49, 8–26. PubMed
- Imokawa, G., Abe, A., Jin, K., et al. (1991). Decreased level of ceramides in stratum corneum of atopic dermatitis: an etiologic factor in atopic dry skin? Journal of Investigative Dermatology, 96(4), 523–526. PubMed
- Man, M.Q., Feingold, K.R., Thornfeldt, C.R., & Elias, P.M. (1996). Optimization of physiological lipid mixtures for barrier repair. Journal of Investigative Dermatology, 106(5), 1096–1101. PubMed
- Motta, S., Monti, M., Sesana, S., et al. (1993). Ceramide composition of the psoriatic scale. Biochimica et Biophysica Acta, 1182(2), 147–151. PubMed
- Draelos, Z.D. (2018). The science behind skin care: moisturizers. Journal of Cosmetic Dermatology, 17(2), 138–144. PubMed
- Government of India, Ministry of Health and Family Welfare. The Drugs and Cosmetics Act, 1940 and the Cosmetics Rules, 2020. CDSCO
Links open the official source or a PubMed search for the cited paper. Motta et al. (1993) introduced the letter-based ceramide naming system.
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