Dr. Althea Aqua Marine Deep Serum (30ml)

What It Is

A lightweight vegan face serum that provides deep hydration for all skin types. Fast-absorbing and non-sticky, it delivers lasting hydration while supporting the skin barrier and calming the skin. 

The Star Technology

It uses patented 3D Hyaluronic Acid technology with 70% Bambusa Vulgaris (Bamboo) Water to deliver deep, long-lasting hydration and enhance the absorption of active ingredients. Rather than conventional purified water as the base, the bamboo water delivers a mineral-rich foundation that works at a structural level. 

The serum's distinctive natural blue hue comes from Guaiazulene, a chamomile-derived extract known for its powerful soothing properties. 

Key Ingredients & What They Do

Bamboo Water (Bambusa Vulgaris) — has an intense moisturizing effect, supports the skin balance and gives the skin a fresh, hydrated feeling. 

Guaiazulene — soothes and protects skin from external irritants, giving the serum its natural blue color. Green Caviar Extract & Panthenol — strengthen the skin barrier. Vegan PDRN & Agave Extract — boost skin elasticity. 

Niacinamide — brightens and evens skin tone (listed in the full ingredient deck alongside Centella Asiatica Extract, multiple marine algae extracts, and Hydrolyzed Hyaluronic Acid).

Texture & Feel

Benefits include long-lasting deep hydration, a non-greasy and fast-absorbing finish, and a glowy, dewy result. 

The lightweight texture absorbs quickly, leaving a silky-soft, non-sticky finish — ideal as a base under SPF or makeup. 

How to Use

Apply the serum after toning, then follow with the Aqua Marine Watery Cream to lock in moisture. Best used morning and evening for optimal results. 

Clean Formula

Free from fragrances, dyes, and potentially irritating additives, this serum is a gentle yet effective moisturizer for daily use. 

Best For

Dehydrated, dry, sensitive, oily, or combination skin — essentially anyone whose skin needs a deep, lasting drink of hydration without heaviness. It sits neatly in the Aqua Marine line alongside the Jelly Mist and Watery Cream for a full layered hydration routine.

Why Seoulma Skincare Recommends It:

The Dr. Althea Aqua Marine Deep Serum earns its place in our edit for a simple reason: it does one thing — deep hydration — and does it with genuine intention. Most hydrating serums deliver a brief surface-level moisture hit and little else. This one is built differently. The 3D Hyaluronic Acid technology works across multiple skin layers, not just the surface, and the 70% bamboo water base means the formula is actively hydrating from its very first ingredient. Add Guaiazulene for real soothing, vegan PDRN for elasticity, and you have a serum that earns the word "deep" in its name. It's free from fragrance, dyes, and irritants — which matters to us — and the fast-absorbing, non-sticky finish means it layers effortlessly into any routine, morning or night. For anyone whose skin feels persistently thirsty despite a solid routine, this is the step that changes things.