No.4 Ceramide AHA Glazed Skin Prep Serum

Brand price

USD 18.20 · checked 26 Sept 2026 · on the brand's site

From the brand

What the brand says about this product. Our ingredient analysis follows below.

Key Ingredients

• Fatty alcohol1

  Waxy fatty alcohols used as emollients and thickeners; unrelated to drying alcohol.

  Cetearyl Alcohol

• Ceramide3

  Skin-identical lipids that hold the barrier together.

  Ceramide AP, Ceramide EOP, Ceramide NP

• Vitamin E1

  Tocopherols — fat-soluble antioxidants.

  Tocopherol

• PHA1

  Polyhydroxy acids — larger and milder than AHAs.

  Gluconolactone

• Panthenol (provitamin B5)1

  Provitamin B5 — a humectant and soother.

  Panthenol

• AHA1

  Alpha hydroxy acids — water-soluble chemical exfoliants.

  Glycolic Acid

• Glycolic acid1

  The smallest AHA, and so the most penetrating.

  Glycolic Acid

• Hyaluronic acid3

  Hyaluronic acid and its salts; a humectant that binds water to the skin.

  Hyaluronic Acid, Sodium Hyaluronate, Sodium Hyaluronate Crosspolymer

• Niacinamide1

  Vitamin B3 — supports the barrier and evens tone.

  Niacinamide

Benefits

• Hydrating20

  Boosts hydration and relieves dry, tight skin.

  Beta-Glucan, Betaine, Butylene Glycol, Caprylic/Capric Triglyceride, Ceramide AP, Ceramide EOP, Ceramide NP, Gluconolactone, Glycerin, Hyaluronic Acid, Hydrolyzed Glycosaminoglycans, Hydrolyzed Hyaluronic Acid, Hydroxyethyl Urea, Panthenol, Propanediol, Sodium Hyaluronate, Sodium Hyaluronate Crosspolymer, Stearic Acid, Tocopherol, Urea

• Barrier Repair14

  Strengthens and restores the skin's natural barrier.

  Betaine, Caprylic/Capric Triglyceride, Ceramide AP, Ceramide EOP, Ceramide NP, Cetearyl Alcohol, Cholesterol, Diphenyl Dimethicone, Glycerin, Niacinamide, Panthenol, Phytosphingosine, Stearic Acid, Tocopherol

• Reduces Irritation2

  Eases discomfort and supports skin resilience.

  Beta-Glucan, Panthenol

• Redness Reducing1

  Soothes visible redness and calms irritation.

  Niacinamide

• Anti-Aging2

  Softens lines and helps skin look youthful.

  Adenosine, Glycolic Acid

• Firming1

  Supports elasticity and bounce.

  Adenosine

• Smoothing5

  Refines rough or uneven texture.

  Cetearyl Alcohol, Cholesterol, Diphenyl Dimethicone, Glycolic Acid, Niacinamide

• Brightening2

  Restores radiance to dull, tired skin.

  Glycolic Acid, Niacinamide

• Dark Spots2

  Fades dark spots for a more even tone.

  Glycolic Acid, Niacinamide

• Even Tone1

  Evens out patchy or uneven colour.

  Niacinamide

• Acne Fighting1

  Helps clear breakouts and keep pores clear.

  Niacinamide

• Oil Control1

  Reduces shine and excess sebum.

  Niacinamide

• Pore Refining1

  Makes pores look smaller and cleaner.

  Niacinamide

• Exfoliating3

  Lifts dead surface cells to smooth texture.

  Gluconolactone, Glycolic Acid, Urea

• Antioxidant1

  Shields skin from free radical damage.

  Tocopherol

• Anti-Pollution2

  Helps defend against airborne pollutants.

  Glycerin, Tocopherol

Concerns

• May Trigger Acne3

  Can clog pores or trigger breakouts.

  Cetearyl Alcohol, Stearic Acid, Tocopherol

• May Worsen Seborrheic Dermatitis11

  May feed the yeast involved in seborrheic dermatitis.

  Ceramide AP, Ceramide As, Ceramide EOP, Ceramide NP, Ceramide Ns, Cetearyl Alcohol, Hydrogenated Lecithin, Phytosphingosine, Polyglyceryl-10 Laurate, Sphingomonas Ferment Extract, Stearic Acid

• May Worsen Keratosis Pilaris3

  May clog follicles or strip skin prone to keratosis pilaris.

  Cetearyl Alcohol, Stearic Acid, Tocopherol

• May Worsen Irritation1

  May cause stinging, redness or sensitivity.

  Tocopherol

Dupes

• Biodance Hydro Cera-nol Serum74% match
• AESTURA ATOBARRIER 365 HYDRO CERA-HA SERUM72% match
• Dr.Althea Vitamin C Boosting Serum71% match
• Anua Rice Ceramide 7 Hydrating Barrier Serum71% match
• Wellage Real Cica Calming 95 Trouble Ampoule71% match
• VT Cosmetics PDRN GLOW AMPOULE71% match