Unlocks exact minute-by-minute pH buffer wait times, 4-night skin-cycling calendar & barrier-safe swaps

Routine Safety Score
62/100
1 Critical Conflict
Max pH Shock (ΔpH)
2.4 pH
Threshold > 1.8
500-Dalton Penetration
84% Pass
MW <= 500 Da Rule
Malassezia / Fungal
0 Triggers
Ester-Free Verified
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Home / Layering Directory / Product INCI Teardown
CLINICAL_TEARDOWN · HARMONY SCORE 86/100 · ΔpH 0.3
Shop Verified Formula at Dermstore ↗ Shop Barrier-Safe Alternative at Sephora ↗

CeraVe PM Facial Moisturizing Lotion INCI Breakdown: Ceramides, Niacinamide & Ceteareth-20 Check

4% Niacinamide + 3 essential ceramides at pH 5.8. Contains Cetearyl Alcohol + Ceteareth-20 (watch for closed comedones in acne-prone skin).

FORMULATION CHEMISTRY
Zero active conflicts (ideal retinoid buffer), but pairs Cetearyl Alcohol + Ceteareth-20 which can trigger closed comedones in highly congestion-prone skin.

Recommended Spacing: 5 Minutes

AM MORNING GLOW RITUAL

Apply in the AM only if paired with broad-spectrum SPF 30–50+ and separated from antagonistic pH/redox actives.

PM BARRIER REPAIR RITUAL

In the PM, Zero active conflicts (ideal retinoid buffer), but pairs Cetearyl Alcohol + Ceteareth-20 which can trigger closed comedones in highly congestion-prone skin.

1. Tap a Curated Vanity Shelf Preset COSMETIC CHEMIST ΔpH ENGINE
Critical Chemical / ΔpH Inactivation Detected Analyzed in 1.62ms
Routine Harmony
5/100
Barrier Stress
98/100
Pore-Clog Load
55/100
Silk pH Spectrum (pH 2.0 Direct Acids → pH 5.5 Skin Mantle → pH 8.0) |ΔpH| > 1.8 = Peptide / Flush Alert
Niacinamide · pH 5.8 Ceramide · pH 5.8 Cholesterol · pH 5.8 Sodium · pH 5.8 Cetearyl · pH 5.8
MODERATE · ΔpH 2.2 Niacinamide (pH 5.8) × Glycolic Acid (pH 3.6)
ΔpH 2.2 Surface pH Shift & Nicotinic Flushing Risk

Immediate layering across a ΔpH 2.2 gap (> 1.8 threshold) buffers the acid's un-ionized free-acid fraction while risking transient nicotinic-acid prostaglandin D2 capillary flushing.

Esthetician Fix: Wait 15 minutes after applying your low-pH acid/Vitamin C before layering Niacinamide, or split AM/PM.
Shop Barrier-Safe Alternative (Dermstore / Sephora) ↗
MODERATE · ΔpH 2.2 Niacinamide (pH 5.8) × Urea (pH 3.6)
ΔpH 2.2 Surface pH Shift & Nicotinic Flushing Risk

Immediate layering across a ΔpH 2.2 gap (> 1.8 threshold) buffers the acid's un-ionized free-acid fraction while risking transient nicotinic-acid prostaglandin D2 capillary flushing.

Esthetician Fix: Wait 15 minutes after applying your low-pH acid/Vitamin C before layering Niacinamide, or split AM/PM.
Shop Barrier-Safe Alternative (Dermstore / Sephora) ↗
MODERATE · ΔpH 2.2 Niacinamide (pH 5.8) × Alcohol Denat. (pH 3.6)
ΔpH 2.2 Surface pH Shift & Nicotinic Flushing Risk

Immediate layering across a ΔpH 2.2 gap (> 1.8 threshold) buffers the acid's un-ionized free-acid fraction while risking transient nicotinic-acid prostaglandin D2 capillary flushing.

Esthetician Fix: Wait 15 minutes after applying your low-pH acid/Vitamin C before layering Niacinamide, or split AM/PM.
Shop Barrier-Safe Alternative (Dermstore / Sephora) ↗
+ View 1 additional secondary ingredient interaction(s)
CRITICAL · ΔpH 2.2 Tretinoin (pH 5.8) × Glycolic Acid (pH 3.6)
Synergistic Corneodesmosome Stripping & ΔpH 2.2 Retinoid Stress

Layering low-pH keratolytic acids (pH 3.0–3.8) with nuclear retinoids strips the stratum corneum barrier, accelerates acid-catalyzed retinoid degradation, and causes severe retinoid dermatitis.

Esthetician Fix: Follow the 4-Night Skin Cycling Protocol: Night 1 Exfoliating Acid, Night 2 Retinoid, Nights 3–4 Ceramide Barrier Recovery.
Shop Barrier-Safe Alternative (Dermstore / Sephora) ↗
Cetearyl Alcohol (2/5 Pore Risk)Isopropyl Myristate (5/5 Pore Risk) Fungal-Acne Trigger: Isopropyl Myristate
AM Morning Glow & PM 4-Night Barrier Ritual
  • AM Prep: pH 5.5 Gentle Amino-Acid Cleanser or Water Rinse [pH 5.5 · Pat dry]
  • AM Barrier + Photoprotection: Physiological Ceramide Moisturizer + Broad-Spectrum SPF 50+ PA++++ [pH 5.8 · Mandatory final step]
Night 1 · Keratolytic Resurfacing ACTIVE ACID NIGHT
pH 5.5 Cleanser (Dry completely) → Direct AHA / BHA Exfoliant (pH 3.2–3.6) · ⏱ Wait 15 min → 3:1:1 Ceramide + Cholesterol Recovery Cream
Night 2 · Cellular Turnover (Retinoid) RETINOID NIGHT
pH 5.5 Cleanser + Snail Mucin / Humectant Buffer (⏱ Dry 15 min) → Pea-sized Rx Tretinoin / Retinaldehyde / Retinol (pH 5.8) → Encapsulated Ceramide Barrier Cream (Sandwich Method)
Night 3 · Peptide & Microbiome Repair PEPTIDE & CICA RECOVERY
pH 5.5 Cleanser + Heartleaf / Centella Toner → Niacinamide 4%–10% + Snail 96 Mucin Essence → Dieux Instant Angel / Aestura Atobarrier 365 Cream
Night 4 · Deep Lamellar Lipid Restoration 100% BARRIER REST
Micellar Water + pH 5.5 Cleanser → Panthenol 5% + Madecassoside + Squalane → La Roche-Posay Cicaplast Baume B5+ or Ceramide Cream
Verified Barrier-Safe Finishers (3:1:1 Ceramide & SPF 50+) Shop Verified Ritual Kit (Sephora / Dermstore) ↗
dermlogic ritual pass 9:16 WALLET
5/100
4 Active Clash(es) · Barrier Stress 98%
AM MORNING GLOW
Prep → Barrier + Photoprotection
PM 4-NIGHT SKIN CYCLING
N1: Exfoliate · N2: Retinoid · N3: Peptide Glaze · N4: Ceramide

Esthetician & Cosmetic Chemist FAQ

What is the formulation pH and full INCI profile of CeraVe PM Facial Moisturizing Lotion?

CeraVe PM Facial Moisturizing Lotion is formulated at pH 5.8 ($17). Full INCI: Aqua/Water/Eau, Glycerin, Caprylic/Capric Triglyceride, Niacinamide, Cetearyl Alcohol, Potassium Phosphate, Ceramide NP, Ceramide AP, Ceramide EOP, Carbomer, Dimethicone, Ceteareth-20, Hyaluronic Acid, Cholesterol.

Which skincare actives conflict with CeraVe PM Facial Moisturizing Lotion?

Zero active conflicts (ideal retinoid buffer), but pairs Cetearyl Alcohol + Ceteareth-20 which can trigger closed comedones in highly congestion-prone skin.

Is CeraVe PM Facial Moisturizing Lotion comedogenic or fungal-acne (Malassezia) safe?

Run the pre-loaded INCI analyzer above to inspect positional comedogenicity (0–5) and C12–C24 Malassezia lipid ester triggers for every ingredient in PM Facial Moisturizing Lotion.

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Bos & Meinardi 500-Dalton Layering Sorter + Apple/Google Calendar (.ICS) Routine Export

Computes exact Dalton molecular weight (MW <= 500 Da trans-epidermal active vs MW > 500 Da surface seal) and generates an RFC-5545 .ics 4-Night Skin-Cycling Calendar for Apple/Google Calendar.

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