Isntree Serum

Explore Isntree’s range of targeted serums, each formulated to address a specific skin need with clean, high-performance ingredients. Compare options for deep hydration, oil balance, or brightening to find the perfect match for your skin’s goals.

Latest Innovations

Meet Our Newest Serum Formulas

Ultra-Low Molecular Hyaluronic Acid Serum - Deep Hydration for Parched Skin

This serum features ultra-low molecular weight hyaluronic acid for superior penetration, delivering deep, lasting hydration to parched skin layers. Its fast-absorbing, lightweight texture makes it ideal for layering under moisturizer without heaviness, providing a plump, refreshed feel for all skin types.

Green Tea Fresh Serum - Balances Oil & Soothes Sensitive Skin

Formulated with pure Jeju Green Tea extract, this serum helps control excess sebum production while providing essential hydration. It calms irritation, balances oil and moisture levels, and leaves a refreshing, non-sticky finish, making it perfect for oily, combination, or sensitive skin seeking equilibrium.

Hyper Retinol EX 1.0 Serum - Peptides & Ceramides for Fine Lines

A potent anti-aging concentrate that combines five peptides with five ceramides to visibly smooth fine lines and strengthen the skin barrier. This targeted treatment supports skin structure and resilience, delivering a firmer, more supple appearance with consistent use for mature or aging skin.

Hyper Vitamin C 23 Serum - For Radiant Tone & Antioxidant Defense

This high-potency serum combines 23% pure Vitamin C with Vitamin E and Panthenol to effectively target dullness, uneven skin tone, and the appearance of dark spots. The formula provides antioxidant protection to help defend against environmental stressors, promoting a brighter, more radiant complexion with consistent use.

Customer Favorites

Best-Selling Solutions for Your Skin

Hyper Vitamin C 23 Serum - For Radiance & Dark Spot Appearance

Powered by 23% pure Vitamin C, stabilized with Vitamin E and Panthenol, this serum brightens uneven skin tone and fights dullness. It helps fade the appearance of dark spots and provides antioxidant protection, leaving skin looking more radiant and healthy with continued use.

Green Tea Fresh Serum 50mL - Daily Hydration & Calming Care

A lightweight, refreshing serum enriched with pure green tea extract to deliver instant hydration and calming effects. It is perfect for daily use to soothe redness and sensitivity while maintaining a balanced, comfortable feel on the skin without any oily residue.

Ultra Low Molecular Hyaluronic Acid Serum - Multi-Layer Moisture Lock

This formula utilizes a spectrum of hyaluronic acid molecular weights, from ultra-low to high, to hydrate multiple skin layers. Enriched with mineral-rich Ulleung Island seawater, it promotes long-lasting moisture retention and prevents evaporation, resulting in a fresh, non-slippery finish.

Solutions for Your Routine

When to Reach for a Serum

For Dry Skin

Combating Dehydration & Dullness

For skin that feels tight, looks dull, or shows fine dehydration lines, a hyaluronic acid serum provides an instant moisture surge and long-term barrier support.

Controlling Oil & Soothing Redness

For Oily Skin

When skin feels oily, looks shiny, or appears irritated, a green tea serum helps regulate sebum, soothe redness, and provide lightweight, non-greasy hydration.

For Aging Skin

Addressing Fine Lines & Loss of Firmness

If you’re noticing early signs of aging like fine lines, loss of firmness, or uneven tone, a serum with peptides, retinol, or Vitamin C can provide targeted support.

Your Skin Concern Matters

How to Pick Your Perfect Serum

Choosing the right Isntree serum depends on your primary skin concern, whether that’s deep hydration, oil control, or anti-aging. Factors like molecular weight, active ingredients, and skin type suitability determine which formula will be most effective for you.

Deep Hydration for Thirsty Skin

For dehydrated or thirsty skin, look for serums with varying molecular weights of hyaluronic acid. Ultra-low molecules penetrate deeper layers for lasting hydration, while higher weights create a moisture-locking barrier on the surface.

Balancing Oily & Combination Skin

If your skin tends to be oily or combination, a green tea-based serum helps control excess sebum production without stripping moisture. Its antioxidant properties also soothe redness and provide balanced, matte hydration for a refreshed feel.

Firming & Brightening Actives

For targeting fine lines and loss of firmness, seek serums with peptides, ceramides, or stabilized Vitamin C. Peptides support collagen structure, ceramides reinforce the skin barrier, and Vitamin C brightens tone while defending against environmental stressors.

Serums for Every Skin Goal

I have dry, sensitive skin and the hyaluronic acid serum has been a game-changer. It absorbs so quickly and my skin feels plump and hydrated all day without any irritation. It layers perfectly under my moisturizer and makeup. I've noticed a real difference in the smoothness of my skin.

As someone with oily, acne-prone skin, I was nervous to try a serum. The green tea formula is incredibly lightweight and actually helps control my shine by midday. It doesn't feel heavy or clog my pores, and it's helped calm some of the redness around my nose. A new staple in my routine.

I bought the Vitamin C serum to help with some dullness and dark spots left from past breakouts. The texture is nice and it doesn't oxidize too quickly. After about a month, my skin tone looks more even and has a healthy glow. It's made my complexion look brighter and more refreshed.

The retinol serum with peptides feels very potent but not harsh. I use it at night and have noticed my fine lines, especially around my eyes, look a little softer. My skin feels firmer. I appreciate that it's formulated with ceramides too, as my skin can get dry. It's a solid anti-aging step.

I was looking for a simple, effective hydrating serum and this fits the bill. The hyaluronic acid version is no-frills and just works. My skin feels more resilient and less tight, especially during the colder months. The price point is also very reasonable for the quality you get.

Real Experiences

What Others Are Saying

Hear from people who have incorporated Isntree serums into their routines, sharing genuine experiences with texture, results, and suitability for different skin types.

Common Serum Questions Answered

Understanding how different serums work, layering them in your routine, and matching them to your skin’s needs can be confusing. Here are answers to common questions to help you choose and use Isntree serums with confidence.

How do I know if I can layer multiple Isntree serums in my routine?

Yes, most Isntree serums are designed to be layered. A common routine is to apply the thinnest, wateriest serum first (like Green Tea Fresh), followed by a slightly richer one (like Hyaluronic Acid). Always pat gently and allow each layer to absorb briefly before applying the next or following with moisturizer.

Should I use a hyaluronic acid serum or a green tea serum first?

It depends on your main goal. For dry, dehydrated skin needing plump hydration, the Hyaluronic Acid Serum is ideal. For oily or combination skin that needs balancing and soothing, the Green Tea Fresh Serum is better suited. For addressing early signs of aging or dullness, consider the Vitamin C or Retinol options.

Are these serums suitable for very sensitive skin types?

Isntree formulates for sensitive skin, so their serums are generally gentle. However, if you have highly reactive skin, always patch test a new product on your inner arm for 24 hours before applying it to your face. The Green Tea and Hyaluronic Acid lines are typically very well-tolerated starting points.

When is the best time to apply a serum in my skincare routine?

For best results, apply your chosen serum to clean, slightly damp skin after cleansing and toning. This helps the active ingredients absorb more effectively. Use 2-3 drops, press it into your face and neck, and then seal it in with your moisturizer. Consistency is key for visible benefits.

Can I use a Vitamin C or retinol serum during the day?

Some actives like pure Vitamin C or Retinol are best used in your evening routine, as they can make skin more sun-sensitive. Always follow with a broad-spectrum sunscreen in the morning, regardless of which serum you use, to protect your skin and maintain results. Hyaluronic acid and green tea are suitable for day or night.

How long does it take to see results from using an Isntree serum?

Visible improvements from hydration-focused serums like Hyaluronic Acid can often be felt immediately in terms of suppleness. For balancing or corrective serums like Green Tea or Vitamin C, consistent use for 4-6 weeks typically reveals clearer, more even-toned results. Be patient and use as directed.

Explore & Learn More

Deepen Your Serum Knowledge

Continue exploring to find detailed ingredients, usage tips, and customer experiences that can help you make the most informed choice for your skincare routine.

Isntree Hyaluronic Acid sunscreens displayed in a clean, natural light setting.

Isntree Sunscreen

Explore Isntree’s range of Hyaluronic Acid sunscreens, designed to merge sun protection with essential hydration. Compare formulas based on SPF strength, texture, and key ingredient benefits to find the daily defender that perfectly suits your skin’s needs and lifestyle.

Primary hero image of the Isntree Hyaluronic Acid Airy Sun Stick SPF50+ PA++++ (22g) product on a clean, light background.

Isntree Sunscreen Stick

ISNTREE’s Hyaluronic Acid Airy Sun Stick provides quick, easy SPF reapplication with an airy, feather-light texture. Its hypoallergenic formula is enriched with 8 types of Hyaluronic Acid for deep hydration and a plumped-up effect, plus Ceramide for barrier support.

Hero product shot of the Isntree Hyaluronic Acid Watery Sun Gel tube against a soft blue background.

Isntree Hyaluronic Acid Watery Sun Gel

This is more than a sunscreen; it’s a hydrating treatment that protects. By fusing the intense moisture-binding power of hyaluronic acid with advanced broad-spectrum filters, it defends against daily environmental stress while leaving skin feeling soft, dewy, and cared for.

The ISNTREE Green Tea Fresh Toner bottle, the primary product hero, displayed against a soft, natural green background evoking freshness.

Isntree Green Tea Toner

The ISNTREE Green Tea Fresh Toner is a quintessential K-Beauty staple, harnessing the antioxidant power of Jeju Island green tea. It uniquely balances effective sebum control with deep, lightweight hydration, making it a must-have for achieving a clear, refreshed, and shine-free complexion without irritation.