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
LOW_PH_ACTIVE · HARMONY SCORE 64/100 · ΔpH 2.8
Shop Verified Formula at Dermstore ↗ Shop Barrier-Safe Alternative at Sephora ↗

Timeless 20% Vitamin C + E Ferulic Acid INCI Analysis: pH 2.7 Penetration vs ΔpH Conflicts

High-potency 20% L-Ascorbic Acid at pH 2.7. High ΔpH shock if layered immediately with peptides or niacinamide.

FORMULATION CHEMISTRY
Formulated at pH 2.7 for maximum protonated L-Ascorbic Acid delivery. Creates a ΔpH > 3.0 shock if layered immediately with Copper Peptides or Niacinamide.

Recommended Spacing: 15 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, Formulated at pH 2.7 for maximum protonated L-Ascorbic Acid delivery. Creates a ΔpH > 3.0 shock if layered immediately with Copper Peptides or Niacinamide.

1. Tap a Curated Vanity Shelf Preset COSMETIC CHEMIST ΔpH ENGINE
Critical Chemical / ΔpH Inactivation Detected Analyzed in 0.49ms
Routine Harmony
5/100
Barrier Stress
98/100
Pore-Clog Load
20/100
Silk pH Spectrum (pH 2.0 Direct Acids → pH 5.5 Skin Mantle → pH 8.0) |ΔpH| > 1.8 = Peptide / Flush Alert
Ascorbic · pH 2.7 Tocopherol · pH 2.7 Ferulic · pH 2.7 Panthenol · pH 2.7 Copper · pH 6.2
CRITICAL · ΔpH 3.5 Ascorbic Acid (pH 2.7) × Copper Tripeptide-1 (pH 6.2)
Cu2+ Fenton-Like Redox Oxidation & Chelation (ΔpH 3.5)

Copper ions in GHK-Cu catalyze rapid single-electron oxidation of Ascorbic Acid while low-pH Vitamin C protonates histidine and strips Cu2+ from the tripeptide.

Esthetician Fix: Strict AM/PM Separation: Apply Vitamin C in the AM under SPF 50 and Copper Peptides in the PM.
Shop Barrier-Safe Alternative (Dermstore / Sephora) ↗
CRITICAL · ΔpH 3.5 Ascorbic Acid (pH 2.7) × Palmitoyl Tripeptide-1 (pH 6.2)
ΔpH 3.5 Amide-Bond Hydrolysis of Signal Peptides

Applying pH 2.7 acid alongside neutral oligopeptides (ΔpH 3.5 > 1.8 threshold) denatures peptide conformation and cleaves matrikine bonds.

Esthetician Fix: Separate into AM (Signal Peptides) vs PM (Direct Acids), or wait at least 20 minutes between layers.
Shop Barrier-Safe Alternative (Dermstore / Sephora) ↗
CRITICAL · ΔpH 3.5 Ascorbic Acid (pH 2.7) × Acetyl Hexapeptide-8 (pH 6.2)
ΔpH 3.5 Amide-Bond Hydrolysis of Signal Peptides

Applying pH 2.7 acid alongside neutral oligopeptides (ΔpH 3.5 > 1.8 threshold) denatures peptide conformation and cleaves matrikine bonds.

Esthetician Fix: Separate into AM (Signal Peptides) vs PM (Direct Acids), or wait at least 20 minutes between layers.
Shop Barrier-Safe Alternative (Dermstore / Sephora) ↗
+ View 17 additional secondary ingredient interaction(s)
MODERATE · ΔpH 3.3 Ascorbic Acid (pH 2.7) × Niacinamide (pH 6)
ΔpH 3.3 Surface pH Shift & Nicotinic Flushing Risk

Immediate layering across a ΔpH 3.3 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) ↗
CRITICAL · ΔpH 3.5 Tocopherol (pH 2.7) × Palmitoyl Tripeptide-1 (pH 6.2)
ΔpH 3.5 Amide-Bond Hydrolysis of Signal Peptides

Applying pH 2.7 acid alongside neutral oligopeptides (ΔpH 3.5 > 1.8 threshold) denatures peptide conformation and cleaves matrikine bonds.

Esthetician Fix: Separate into AM (Signal Peptides) vs PM (Direct Acids), or wait at least 20 minutes between layers.
Shop Barrier-Safe Alternative (Dermstore / Sephora) ↗
CRITICAL · ΔpH 3.5 Tocopherol (pH 2.7) × Acetyl Hexapeptide-8 (pH 6.2)
ΔpH 3.5 Amide-Bond Hydrolysis of Signal Peptides

Applying pH 2.7 acid alongside neutral oligopeptides (ΔpH 3.5 > 1.8 threshold) denatures peptide conformation and cleaves matrikine bonds.

Esthetician Fix: Separate into AM (Signal Peptides) vs PM (Direct Acids), or wait at least 20 minutes between layers.
Shop Barrier-Safe Alternative (Dermstore / Sephora) ↗
MODERATE · ΔpH 3.3 Tocopherol (pH 2.7) × Niacinamide (pH 6)
ΔpH 3.3 Surface pH Shift & Nicotinic Flushing Risk

Immediate layering across a ΔpH 3.3 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) ↗
CRITICAL · ΔpH 3.5 Ferulic Acid (pH 2.7) × Palmitoyl Tripeptide-1 (pH 6.2)
ΔpH 3.5 Amide-Bond Hydrolysis of Signal Peptides

Applying pH 2.7 acid alongside neutral oligopeptides (ΔpH 3.5 > 1.8 threshold) denatures peptide conformation and cleaves matrikine bonds.

Esthetician Fix: Separate into AM (Signal Peptides) vs PM (Direct Acids), or wait at least 20 minutes between layers.
Shop Barrier-Safe Alternative (Dermstore / Sephora) ↗
CRITICAL · ΔpH 3.5 Ferulic Acid (pH 2.7) × Acetyl Hexapeptide-8 (pH 6.2)
ΔpH 3.5 Amide-Bond Hydrolysis of Signal Peptides

Applying pH 2.7 acid alongside neutral oligopeptides (ΔpH 3.5 > 1.8 threshold) denatures peptide conformation and cleaves matrikine bonds.

Esthetician Fix: Separate into AM (Signal Peptides) vs PM (Direct Acids), or wait at least 20 minutes between layers.
Shop Barrier-Safe Alternative (Dermstore / Sephora) ↗
MODERATE · ΔpH 3.3 Ferulic Acid (pH 2.7) × Niacinamide (pH 6)
ΔpH 3.3 Surface pH Shift & Nicotinic Flushing Risk

Immediate layering across a ΔpH 3.3 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) ↗
CRITICAL · ΔpH 3.5 Panthenol (pH 2.7) × Palmitoyl Tripeptide-1 (pH 6.2)
ΔpH 3.5 Amide-Bond Hydrolysis of Signal Peptides

Applying pH 2.7 acid alongside neutral oligopeptides (ΔpH 3.5 > 1.8 threshold) denatures peptide conformation and cleaves matrikine bonds.

Esthetician Fix: Separate into AM (Signal Peptides) vs PM (Direct Acids), or wait at least 20 minutes between layers.
Shop Barrier-Safe Alternative (Dermstore / Sephora) ↗
CRITICAL · ΔpH 3.5 Panthenol (pH 2.7) × Acetyl Hexapeptide-8 (pH 6.2)
ΔpH 3.5 Amide-Bond Hydrolysis of Signal Peptides

Applying pH 2.7 acid alongside neutral oligopeptides (ΔpH 3.5 > 1.8 threshold) denatures peptide conformation and cleaves matrikine bonds.

Esthetician Fix: Separate into AM (Signal Peptides) vs PM (Direct Acids), or wait at least 20 minutes between layers.
Shop Barrier-Safe Alternative (Dermstore / Sephora) ↗
MODERATE · ΔpH 3.3 Panthenol (pH 2.7) × Niacinamide (pH 6)
ΔpH 3.3 Surface pH Shift & Nicotinic Flushing Risk

Immediate layering across a ΔpH 3.3 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) ↗
CRITICAL · ΔpH 3.5 Copper Tripeptide-1 (pH 6.2) × 3-O-Ethyl Ascorbic Acid (pH 2.7)
Cu2+ Fenton-Like Redox Oxidation & Chelation (ΔpH 3.5)

Copper ions in GHK-Cu catalyze rapid single-electron oxidation of Ascorbic Acid while low-pH Vitamin C protonates histidine and strips Cu2+ from the tripeptide.

Esthetician Fix: Strict AM/PM Separation: Apply Vitamin C in the AM under SPF 50 and Copper Peptides in the PM.
Shop Barrier-Safe Alternative (Dermstore / Sephora) ↗
CRITICAL · ΔpH 3.5 Palmitoyl Tripeptide-1 (pH 6.2) × 3-O-Ethyl Ascorbic Acid (pH 2.7)
ΔpH 3.5 Amide-Bond Hydrolysis of Signal Peptides

Applying pH 2.7 acid alongside neutral oligopeptides (ΔpH 3.5 > 1.8 threshold) denatures peptide conformation and cleaves matrikine bonds.

Esthetician Fix: Separate into AM (Signal Peptides) vs PM (Direct Acids), or wait at least 20 minutes between layers.
Shop Barrier-Safe Alternative (Dermstore / Sephora) ↗
CRITICAL · ΔpH 3.5 Palmitoyl Tripeptide-1 (pH 6.2) × Polysorbate 20 (pH 2.7)
ΔpH 3.5 Amide-Bond Hydrolysis of Signal Peptides

Applying pH 2.7 acid alongside neutral oligopeptides (ΔpH 3.5 > 1.8 threshold) denatures peptide conformation and cleaves matrikine bonds.

Esthetician Fix: Separate into AM (Signal Peptides) vs PM (Direct Acids), or wait at least 20 minutes between layers.
Shop Barrier-Safe Alternative (Dermstore / Sephora) ↗
CRITICAL · ΔpH 3.5 Acetyl Hexapeptide-8 (pH 6.2) × 3-O-Ethyl Ascorbic Acid (pH 2.7)
ΔpH 3.5 Amide-Bond Hydrolysis of Signal Peptides

Applying pH 2.7 acid alongside neutral oligopeptides (ΔpH 3.5 > 1.8 threshold) denatures peptide conformation and cleaves matrikine bonds.

Esthetician Fix: Separate into AM (Signal Peptides) vs PM (Direct Acids), or wait at least 20 minutes between layers.
Shop Barrier-Safe Alternative (Dermstore / Sephora) ↗
CRITICAL · ΔpH 3.5 Acetyl Hexapeptide-8 (pH 6.2) × Polysorbate 20 (pH 2.7)
ΔpH 3.5 Amide-Bond Hydrolysis of Signal Peptides

Applying pH 2.7 acid alongside neutral oligopeptides (ΔpH 3.5 > 1.8 threshold) denatures peptide conformation and cleaves matrikine bonds.

Esthetician Fix: Separate into AM (Signal Peptides) vs PM (Direct Acids), or wait at least 20 minutes between layers.
Shop Barrier-Safe Alternative (Dermstore / Sephora) ↗
MODERATE · ΔpH 3.3 Niacinamide (pH 6) × 3-O-Ethyl Ascorbic Acid (pH 2.7)
ΔpH 3.3 Surface pH Shift & Nicotinic Flushing Risk

Immediate layering across a ΔpH 3.3 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 3.3 Niacinamide (pH 6) × Polysorbate 20 (pH 2.7)
ΔpH 3.3 Surface pH Shift & Nicotinic Flushing Risk

Immediate layering across a ΔpH 3.3 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) ↗
Tocopherol (2/5 Pore Risk) Fungal-Acne Trigger: Polysorbate 20
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 Antioxidant (Low pH): L-Ascorbic Acid 15%–20% + Ferulic Acid Serum [pH 3.2 · ⏱ Wait 15 min (ΔpH Equilibration)]
  • AM Barrier + Photoprotection: Physiological Ceramide Moisturizer + Broad-Spectrum SPF 50+ PA++++ [pH 5.8 · Mandatory final step]
Night 1 · Keratolytic Resurfacing GENTLE PREP
pH 5.5 Cleanser → Hydrating Essence + Niacinamide 5% → Ceramide Barrier Cream
Night 2 · Cellular Turnover (Retinoid) REPAIR NIGHT
pH 5.5 Cleanser → Multi-Peptide or Brightening Serum → Lipid Recovery Moisturizer
Night 3 · Peptide & Microbiome Repair PEPTIDE & CICA RECOVERY
pH 5.5 Cleanser + Heartleaf / Centella Toner → Copper Peptides 1% (GHK-Cu) + Hyaluronic Acid (pH 6.2) → 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
20 Active Clash(es) · Barrier Stress 98%
AM MORNING GLOW
Prep → Antioxidant (Low pH) → 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 Timeless Skin Care 20% Vitamin C + E Ferulic Acid Serum?

Timeless Skin Care 20% Vitamin C + E Ferulic Acid Serum is formulated at pH 2.7 ($26). Full INCI: Water, Ethoxydiglycol, L-Ascorbic Acid, Propylene Glycol, Alpha Tocopherol, Polysorbate 80, Panthenol, Ferulic Acid, Sodium Hyaluronate, Benzylalcohol, Dehydroacetic Acid.

Which skincare actives conflict with Timeless Skin Care 20% Vitamin C + E Ferulic Acid Serum?

Formulated at pH 2.7 for maximum protonated L-Ascorbic Acid delivery. Creates a ΔpH > 3.0 shock if layered immediately with Copper Peptides or Niacinamide.

Is Timeless Skin Care 20% Vitamin C + E Ferulic Acid Serum 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 20% Vitamin C + E Ferulic Acid Serum.

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Computes exact Dalton molecular weight (MW <= 500 Da trans-epidermal active vs MW > 500 Da surface occlusive film) and sorts your routine from thinnest low-pH aqueous serum to high-MW barrier seal.

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