COSRX Hyaluronic Acid 3% Serum – Hypoallergenic Daily Hydrator for Sensitive and Reactive Skin
COSRX Hyaluronic Acid 3% Serum – Hypoallergenic Daily Hydrator for Sensitive and Reactive Skin
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Why you'll love it
- Clinically meaningful 3% pure hyaluronic acid concentration delivers visible plumping and hydration
- Fragrance-free, hypoallergenic formula is safe for sensitive and reactive skin types
- Multi-active complex combines hyaluronic acid, ceramides, and NMFs in one step
- Clean beauty credentials — free from parabens, sulfates, phthalates, and animal testing
- Trusted K-beauty brand reputation with dermatologist-tested formulation
Perfect for
- Daily 2-3 drop application to face and neck for deep hydration
- Layering under moisturizer and sunscreen as a hydrating serum step
- Targeting fine lines and wrinkles with plumping hydration
- Under-eye area treatment to address dryness and crepiness
- Skin barrier repair using ceramide and NMF complex
Product Information
The Hyaluronic Acid 3% Serum: 3x Hydration. Composed of a specialized complex of Hyaluronic Acid, Ceramides, and Natural Moisturizing Factors, the serum locks hydration deep in your skin.
Key Benefits: Based on real results from consumers' self assessments, the Hyaluronic 3 Serum replenishes hydration, visibly plumps the skin, and improves dryness.
Dermatological Ingredients: 3% Pure Hyaluronic Acid helps retain mositure and instantly plumps skin. Ceramide & NMF (Natural Moisturising Factors) strengthen the skin's barrier.
How to Use: Apply 2-3 drops to your face and neck once or twice daily. Can be applied under the eye area; avoid direct eye contact. *Perform a patch test on the body before using on the face.
COSRX Standards: COSRX Standards: All COSRX products are formulated with skin-friendly ingredients that alleviate irritated skin. Hypoallergenic, Dermatologist tested, Animal Testing-FREE, Parabens-FREE, Sulfates-FREE, Phthalates-FREE
Items Details
Number of Items: 1
Features & Specs
Skin Type: All
Product Benefits: Rejuvenating
Target Use Body Part: Face
Scent Name: Unscented
Special Ingredients: hyaluronic_acid
Item Form: Drop
Skin Tone: All
Frequently Asked Questions
Is this serum truly fragrance-free or just unscented with masking ingredients?
It is genuinely free of artificial fragrance. COSRX formulates without added perfumes or masking scents, making it safe for users who react to fragrance or prefer clean-label skincare.
Is the formula dermatologist-tested for sensitive and reactive skin?
Yes. The serum is dermatologist-tested and hypoallergenic, designed specifically to minimize the risk of irritation for sensitive, allergy-prone, or post-treatment skin.
Does this serum contain any ingredients my allergist might flag?
The formula is free from parabens, sulfates, phthalates, and artificial fragrance — common allergens of concern. It is also cruelty-free, with no animal testing at any stage.
Is this safe to use after laser treatments, chemical peels, or microneedling?
The hypoallergenic, fragrance-free formula is gentle enough for post-treatment recovery, though you should always follow your dermatologist's specific aftercare instructions.
Will the ceramide and NMF complex cause any barrier disruption for eczema-prone skin?
No. Ceramides and Natural Moisturizing Factors are the same building blocks found in healthy skin, so they help repair and reinforce the barrier rather than disrupt it.
Is this serum safe enough for my entire family to use?
While formulated for adult skincare routines, the gentle, hypoallergenic profile makes it suitable for users with sensitive skin across age groups. Consult a pediatrician for use on children.
How do I know this won't cause breakouts or clogged pores?
The lightweight, non-comedogenic formula absorbs cleanly and is designed to hydrate without congesting pores, making it suitable for acne-prone and sensitive skin alike.
Is this a safer daily alternative to harsher anti-aging treatments like retinol?
Yes. Hyaluronic acid, ceramides, and NMFs are among the gentlest anti-aging actives available, offering plumping and barrier support without the irritation often associated with retinol.
How does this compare to a prescription-strength hydrating treatment?
It delivers a clinically meaningful 3% pure hyaluronic acid concentration along with ceramides and NMFs, offering comparable hydration benefits through a gentler, over-the-counter formula.
Is this safer than serums that contain essential oils or botanical extracts?
Yes. Many essential oils and botanical extracts are known skin sensitizers. This serum is formulated without them, reducing the risk of irritation while still delivering powerful hydration.
I'm worried about 'clean beauty' claims — is this really free from harsh additives?
Yes. The serum is verified free from parabens, sulfates, phthalates, and artificial fragrance, with no animal testing — meeting strict clean beauty standards.
What if my skin reacts — is there a satisfaction guarantee?
While return policies vary by retailer, the hypoallergenic, dermatologist-tested formula is specifically engineered to minimize the chance of adverse reactions.
Is it safe to use this serum around my eyes where skin is thinnest?
Yes. The gentle, fragrance-free formula is suitable for the delicate under-eye area to address dryness, crepiness, and fine lines.
How do I use COSRX Hyaluronic Acid 3% Serum in my skincare routine?
After cleansing and toning, apply 2-3 drops to damp skin on the face and neck. Gently press in until absorbed, then follow with moisturizer and sunscreen during the day or a night cream in the evening.
Can I layer this serum with other active ingredients like retinol or vitamin C?
Yes. The hyaluronic acid serum is gentle enough to layer with most actives. Apply it first on damp skin, then follow with vitamin C in the morning or retinol in the evening for enhanced results.
How long does a 20ml bottle typically last with daily use?
With 2-3 drops applied twice daily, a 20ml bottle generally lasts 6-8 weeks, depending on how much you use per application.
Is this serum compatible with all skin types, including oily and acne-prone skin?
Yes. The lightweight, non-comedogenic, fragrance-free formula is suitable for dry, oily, combination, sensitive, and acne-prone skin types.
Can I use this serum on my neck and under-eye area too?
Absolutely. The gentle formulation is safe for the neck, décolletage, and under-eye area, where it helps address dryness, crepiness, and fine lines.
What's included in the box when I purchase this serum?
Each box contains one 20ml (0.67 fl. oz.) COSRX Pure Sodium Hyaluronic Acid 3% Serum in a dropper bottle, ready to use. No additional tools or accessories are required.
Are there any side effects I should be aware of?
The serum is hypoallergenic, dermatologist-tested, and free from common irritants. Side effects are rare, though anyone with known sensitivities should review the full ingredient list before use.
Is this product safe to use during pregnancy or while breastfeeding?
The fragrance-free, hypoallergenic formula is generally considered safe during pregnancy and breastfeeding. However, you should always consult your healthcare provider before introducing new skincare products during this time.
How is a hyaluronic acid serum different from a regular moisturizer?
A hyaluronic acid serum delivers concentrated hydration deep into the skin, while a moisturizer seals in moisture and provides surface-level nourishment. Layering both gives optimal hydration and barrier protection.
