IsNtree Ultra-Low Molecular Hyaluronic Acid Serum 1.69 fl oz — Deep, Lightweight Hydration

ISNTREE Ultra-Low Molecular Hyaluronic Acid Serum is a fast-absorbing Korean serum that delivers multi-layer hydration using low molecular weight hyaluronic acid for plumper, smoother-feeling skin.

This lightweight 1.69 fl oz serum is formulated to penetrate more deeply than standard hyaluronic acid, providing multiple levels of moisture without heaviness or stickiness. Clinically proven to be non-irritating and vegan, it’s designed for daily use under moisturizers or makeup. The texture absorbs quickly and helps replenish skin’s surface and inner layers with hydration that supports a comfortable, supple look.

How does this serum hydrate without feeling heavy?

The formulation uses ultra-low molecular weight hyaluronic acid particles that move past the skin’s surface, helping hydration reach deeper layers while maintaining a featherlight finish. Fast absorption prevents tackiness and layers well with other skincare.

• Ultra-low molecular HA for deeper penetration
• Thin, gel-like texture that absorbs quickly
• Non-greasy formula that layers under creams and sunscreen
• Vegan ingredients reduce risk of heavy occlusion

When and how should I use this in my routine?

Apply after cleansing and toning, while skin is slightly damp, to maximize hyaluronic acid’s water-binding effect. Use a few drops and gently pat into the face and neck, then follow with moisturizer to lock in hydration.

• Morning and/or evening application after toner or essence
• Apply to damp skin for stronger hydration effect
• Follow with moisturizer or cream to seal moisture
• Works under makeup; absorbs quickly without pilling

What skin types and concerns benefit most from this serum?

This serum targets dryness and dullness by restoring moisture at multiple layers. Its lightweight profile suits oily, combination and normal skin, while the gentle, clinically non-irritating formula is also compatible with more sensitive types.

• Dry and dehydrated skin seeking deeper hydration
• Oily or combination skin wanting non-greasy moisture
• Sensitive skin preferring clinically non-irritating formulas
• Anyone layering moisturizers or actives who needs fast-absorbing hydration

What makes this different from regular hyaluronic serums?

Unlike higher-molecular-weight hyaluronic acids that sit mainly on the surface, ultra-low molecular fragments are designed to reach beneath the epidermis, supporting hydration in deeper strata. The result is a more comprehensive hydration profile without added weight.

• Multiple hydration layers vs. surface-only moisture
• Formulated to absorb quickly and layer well
• Clinically tested to be non-irritating
• Vegan formulation with straightforward ingredients

Who is this for? ISNTREE Ultra-Low Molecular Hyaluronic Acid Serum is ideal for anyone who wants effective, fast-absorbing hydration that layers easily with other skincare or makeup. It’s particularly useful for people dealing with persistent dryness, seasonal moisture loss, or those who prefer lightweight textures—suitable across most skin types including sensitive skin. Use it daily to help maintain a hydrated, smooth-feeling complexion while keeping your routine simple and comfortable.

Ingredients

Sea water, water, methylpropanediol, glycerin, butylene glycol, 1,2-hexanediol, hydrolyzed hyaluronic acid, sodium hyaluronate, hydrolyzed sodium hyaluronate, potassium hyaluronate, sodium acetylated hyaluronate, hydroxypropyltrimonium hyaluronate, sodium hyaluronate crosspolymer, dimethylsilanol hyaluronate, hydrolyzed calcium hyaluronate, sodium sulfated hyaluronate, sodium stearoyl hyaluronate, sodium oleoyl hyaluronate, hyaluronic acid, betaine, pentylene glycol, carbomer, caprylyl