Isntree Ultra-Low Molecular Hyaluronic Acid Serum
Isntree · Serum

Ultra-Low Molecular Hyaluronic Acid Serum

Korea ranking #14 serumUS stock

A lightweight hydrating serum focused entirely on hyaluronic acid in a range of molecular sizes, meant for skin that feels dry, tight, or dehydrated. It sinks in fast as a slippery, watery gel with no tackiness or scent. A simple, gentle option to layer into almost any routine when you want more moisture.

More detail

The serum stacks many weights of hyaluronic acid — from ultra-low-molecular hydrolyzed HA up to larger forms — so it draws water into different layers of the skin's surface, and a sea-water base adds minerals. Soothing extras like panthenol, allantoin, madecassoside, and beta-glucan help calm and comfort. The texture is a thin, fast-absorbing gel; apply a few drops to damp skin after cleansing (and toner, if you use one), morning and night, before your moisturizer. Because hyaluronic acid is a humectant, seal it in with a cream — especially in dry air — so it holds moisture in rather than pulling it from your skin. It's fragrance-free and alcohol-free, making it friendly for sensitive, reactive skin.

4.53,100 reviews
AEvidence grade
$18Best total · duties in
lightTexture · Serum
For: Dry · Normal · Combination · Oily · SensitiveAll tonesDehydration
Is this right for your skin? take the 60-second quiz and this box becomes a personal verdict.
Skin fit ×45%
Evidence ×35%96
Practicality ×20%50
Ingredient check⚠ 1 caution flag
Fragrance-free Fungal-acne safe No drying alcohol Essential-oil free No pregnancy-caution actives
Hyaluronic acidHumectant that binds waterPanthenol (B5)Soothing humectant that speeds barrier recovery
Evidence checkGrade A
Grade ADisclosed formula and multi-year consistent cross-platform ratings (seed draft — verify before launch).
How grading works
Scored on clinicals · certifications · cross-platform rating consistency · transparency. Brands can't pay to change this.
What Korea says#14 serum
#14 serum · Korea ranking · Rank indicative — weekly verification pending
Reviewscommunity links

No close skin matches yet —

Used this product?
Read full third-party reviews

We link out instead of copying — full reviews belong to their authors and platforms.

Where to buybest total $18
RetailerPriceShip + dutyTotal
Amazon ✓ official
Official store — verify seller before launch
Accepts: Visa · MC · Amex · Discover · Amazon Pay · Affirm
$18$18BESTShop →
Olive Young Global ✓ official
Ships from Korea 7–14d · +15% duty
Accepts: Cards · PayPal · Apple Pay · Alipay+
$14$9.10$23.10Shop →
Isntree official ✓ official
Brand's official store, ships from Korea · +15% duty
Accepts: Cards · PayPal (varies)
$18$8.70$26.70Shop →

Totals include estimated import duty on Korea-shipped orders (15%, post–de minimis). Links open retailer search; exact product links are coming at launch. Payment methods indicative — verify at checkout.

Similar & possibly cheaper

Tap a product for its full page, or ↔ Compare for the head-to-head table.

See all Ultra-Low Molecular Hyaluronic Acid Serum dupes & cheaper picks →