The Inkey List
20% Niacinamide Serum
about $16.00
Zinc PCA
Zinc PCA draws moisture into the skin, and also leaves skin feeling smoother or better cared for.
Recent research
Tracking 1 published papers (2025).
Where it fits in real formulas
Related ingredients, common formula neighbors, naming, and catalog context. This stays separate from evidence and personal-fit guidance.
Similar ingredients
related by documented function or concern
Hyaluronic Acid (salt form)Pulls water into the skin for immediate hydration and a plumper lookHyaluronic AcidBinds water at the skin surface and supports short-term hydration. The widely repeated claim that it holds 1,000 times its weight in water is not supported by direct measurement. A 2025 review reported about 0.7–2 grams of water per gram of polysaccharide.AHA exfoliant (gentle)Exfoliates surface scale and can make rough texture feel smootherUreaHelps dry, tight skin hold more waterHydrolyzed KeratinConditions hair and smooths a damaged, rough cuticlePro-vitamin B5Moisturizes and improves hydration by drawing and holding water in the skin
Where it's used
Real brands and product categories from the 121 decoded products listing Zinc PCA — an observation of our catalog, not a claim about market share.
Product categories
serums (31), moisturizers (17), toners (14), shampoos (13), cleansers (8), masks (8)
Based on those categories, Zinc PCA shows up mostly in leave-on products (70 of 97 classified) — derived from product category, not a label fact.
Commonly appears alongside
How often another ingredient appears in the same decoded products. This does not show routine compatibility.
Azelaic Acid3%4 of 121 decoded productsPiroctone Olamine5%6 of 121 decoded productsCaffeine14%17 of 121 decoded productsUrea4%5 of 121 decoded productsAHA exfoliant6%7 of 121 decoded productsBHA exfoliant17%20 of 121 decoded productsRetinyl Palmitate3%4 of 121 decoded productsAlpha-Arbutin2%3 of 121 decoded productsAHA exfoliant (gentle)13%16 of 121 decoded products
Products with Zinc PCA
All 115 →115 public products list this ingredient.
Catalog preview
A compact look at the first products in this result set
1–1 / 12
Inkey List
Beta Hydroxy Acid (BHA) Serum
about $10.00
Inkey List
Salicylic Acid Cleanser - 150ml
about $12.00
COSRX
One Step Original Blemish Pore Clear Pad
about $18.20
COSRX
The Niacinamide 15 Serum
about $17.50
COSRX
COSRX PEPTIDE-132 Ultra Perfect Hair Bonding Shampoo
about $25.90
COSRX
Low pH Niacinamide Micellar Cleansing Water
about $10.50
COSRX
AC Collection Lightweight Soothing Moisturizer
about $13.30
COSRX
Centella Blemish Cream
about $14.70
The Inkey List
360° Skin Clearing Serum Duo
about $30.40
The Inkey List
360° Skin Clearing Serum
about $16.00COSRX
COSRX The Niacinamide 15 Serum 20ml
about $17.50
About the sources
Ingredient lists show presence and order, not concentration, pH, ingredient grade, delivery system, or finished-formula performance.
Sources & methodologyCompiled from the EU CosIng database (ref 38970) · snapshot 16 June 2026. CosIng is an informational, non-legally-binding reference. Inclusion does not mean an ingredient is approved, safe, authorized for cosmetic use, or clinically effective. An INCI list does not reveal concentration, pH, ingredient grade, delivery system, or finished-formula performance.