Snapshot
- Overview
- A lightweight hyaluronic acid that hydrates and smooths skin fast.
- Category
- Hydration, Skin Conditioning, Barrier Support
- Type
- Humectant
4.5 kDa Hydroxypropyltrimonium Hyaluronate
4.5 kDa Hydroxypropyltrimonium Hyaluronate is a cationic, low-molecular-weight hyaluronic acid derivative that's water-soluble and film-forming. Skincare formulas use it to attract moisture, condition the surface, and improve feel and wear.
Like this ingredient?
Our take
Is 4.5 kDa Hydroxypropyltrimonium Hyaluronate a Good Ingredient?
Rated Great, because this low–molecular-weight, cationic HA derivative shows well-documented hydration benefits, adheres well to skin, and is typically stable in water-based formulas. It is generally low–irritation and helps improve moisture retention without heaviness.
What it does
Skin Benefits
Delivers quick, deep-feeling hydration that leaves skin looking plumper and smoother. Helps reduce the sensation of tightness and keeps moisture feeling locked in through the day.
Where you'll find it
Uses in Skincare & Cosmetics
Common in lightweight serums, essences, and sheet masks to boost water retention. Also used in leave‑on moisturizers to improve slip and a soft-touch finish.
Before you use it
Safety
Considered well tolerated for most users, with a low likelihood of irritation. Suitable for daily use in leave-on products; avoid use on compromised skin if sensitivity occurs.
Products with 4.5 kDa Hydroxypropyltrimonium Hyaluronate
