OSEA Hyaluronic Acid Sea Serum 1 oz – Lightweight Hydrating Face Serum with Multi-Weight HA & Seaweed

OSEA Hyaluronic Acid Sea Serum is a concentrated, fast-absorbing face serum that hydrates and helps visibly smooth the appearance of fine lines using multi-weight hyaluronic acid plus seaweed extracts.

This lightweight serum blends two sizes of hyaluronic acid with Japanese Miru seaweed and snow mushroom to replenish surface moisture and support a more resilient-looking skin texture. Designed for daily layering under creams or makeup, it’s formulated by OSEA to deliver immediate hydration while emphasizing clean, plant-forward ingredients and eco-minded sourcing.

How will this serum change my daily hydration routine?

The serum is built for quick absorption and works as a foundational hydrating step. Use it after cleansing and toning to lock in moisture and create a smoother base for moisturizers or SPF.

• Fast-absorbing formula that layers easily under other products
• Two molecular weights of hyaluronic acid for surface and deeper hydration
• Complements moisturizers and enhances makeup application

What ingredients help reduce the look of fine lines?

Hyaluronic acid molecules attract and hold moisture at different skin levels, plumping the appearance of fine lines. Seaweed extracts and snow mushroom help maintain hydration balance for a softer-looking texture without heavy oils.

• Low- and high-molecular-weight hyaluronic acid for multi-depth hydration
• Japanese Miru seaweed to support moisture retention
• Snow mushroom for a lightweight, smoothing effect

Is this product suitable for sensitive or reactive skin?

OSEA formulated this serum to be gentle and free of common irritants like parabens, phthalates, and synthetic fragrances. Because it is lightweight and non-comedogenic, many skin types can tolerate it, but patch testing is recommended for very reactive skin.

• Vegan, cruelty-free, and gluten-free formulation
• No PEGs, parabens, phthalates, or synthetic fragrances
• Light texture reduces likelihood of pore-clogging

How do I incorporate it into my anti-aging regimen?

Apply a few drops morning and/or evening after cleansing and toning, then follow with a moisturizer and sunscreen during the day. It works well under retinoids or stronger actives as a hydration bridge to minimize dryness.

• Use 2–3 drops on damp skin for best absorption
• Layer before heavier creams or makeup for smoother finish
• Compatible with most serums and targeted treatments

Who is this for: OSEA Hyaluronic Acid Sea Serum is ideal for anyone seeking a clean, plant-forward hydrator that enhances skin plumpness and smoothness without heavy oils or synthetic additives. It appeals to conscious shoppers who prioritize vegan, cruelty-free skincare and want a lightweight step to strengthen their skin’s moisture appearance—suitable for normal, combination, and dry skin types, and often useful as a hydrating complement for sensitive or aging-prone skin when used as directed.

Ingredients

NATURAL DERIVED INGREDIENTS: Aqua, Gigartina Skottsbergii Extract, Macrocystis Pyrifera Extract, Undaria Pinnatifida Extract, Sodium Hyaluronate, Hyaluronic Acid, Potassium Sorbate, Citric Acid, Lonicera Caprifolium Extract, Lonicera Japonica Extract, Chlorophyll