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4D Hyaluronic Serum
  • 4D Hyaluronic Serum
  • 4D Hyaluronic Serum
  • 4D Hyaluronic Serum
  • 4D Hyaluronic Serum
  • 4D Hyaluronic Serum
  • 4D Hyaluronic Serum
4D Hyaluronic Serum

4D Hyaluronic Serum

Deep Hydration, Moisture and Protection

30ml
$99.00 AUD
New

4D Hyaluronic Serum delivers megadoses of hydration with a multi-dimensional approach that works both instantly and long term. This lightweight water-gel serum penetrates deeply to restore moisture and water balance, plump skin and relieve dehydration. By supporting optimal hydration pathways, it smooths fine lines, strengthens the barrier and revitalises the complexion. Skin is left supple, refreshed and deeply hydrated, with a radiant and youthful glow.
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How To Use
  • Apply morning and/or evening
  • Dispense 1 pump onto fingertips
  • Apply to freshly cleansed skin on the face and neck, including around the eye area
  • Follow with O Hydrator and Mineral Pro SPF 30 or 50 in the AM for UV protection
Best For
  • Dehydrated, dry skin
  • Beginners in active skincare to restore and balance hydration levels

Why You'll Love It

4D Multi-Layer Hydration

Four forms of Sodium Hyaluronate work together to create a three-dimensional hydration network, supporting moisture across multiple layers of the skin for a smoother, plumper-looking complexion. 

Ultra-high molecular weight Sodium Hyaluronate Crosspolymer forms a breathable protective film on the skin’s surface to help reduce water loss and keep hydration locked in. 

This advanced hydration shield supports barrier function while helping defend against everyday environmental stressors, including pollution and UV-related dehydration.

High molecular weight Sodium Hyaluronate nourishes and holds water at the skin surface, while Sodium Acetylated Hyaluronate adheres to the top layer of skin to support smoother, softer and more supple skin.

Ultra-low molecular weight Hydrolyzed Sodium Hyaluronate rapidly penetrates deeper skin layers to support moisture, visible elasticity and skin bounce from within.

By combining four Hyaluronic Acid technologies, this serum helps improve the look of fine lines, dryness, texture and dehydration for skin that feels fresh and deeply hydrated.

Functional Actives - Key Ingredients

4D Hyaluronic Acid

An advanced, multi-weight hyaluronic system that hydrates across multiple skin layers to improve elasticity, plumpness and barrier function providing immediate and long-lasting hydration.

Full Ingredients List

Aqua, Pentylene Glycol, Ethoxydiglycol, Glycerin, Propanediol, Sodium Hyaluronate Crosspolymer, Sodium Hyaluronate, Sodium Acetylated Hyaluronate, Hydrolyzed Sodium Hyaluronate, Ethylhexylglycerin, Heptyl Glucoside, Sodium Benzoate, Potassium Sorbate, Sodium Levulinate, Citric Acid.

While we work hard to keep our ingredient information current, formulations may evolve or differ slightly. For complete accuracy, always refer to the ingredient list printed on your product’s packaging - it’s the definitive source.

How It Works

4D Hyaluronic Serum harnesses four advanced forms of Sodium Hyaluronate, each selected for its unique molecular weight and affinity with the skin. This multi-dimensional hydration system creates a four-dimensional moisture network, helping reduce transepidermal water loss while delivering complete, multi-layer hydration. Ultra-high molecular weight Sodium Hyaluronate Crosspolymer forms a protective film on the skin surface, high molecular weight molecules nourish and hold water, Sodium Acetylated Hyaluronate adheres to the stratum corneum for lasting hydration and ultra-low molecular weight Hydrolyzed Sodium Hyaluronate penetrates deeper to support visible elasticity, leaving skin plump, smooth and supple.

Good To Know

  • Free from parabens, sulfates, petrochemicals and mineral oils
  • No artificial colours or harsh preservatives
  • No use of harsh synthetic fragrances
  • Vegan-friendly, gluten free and cruelty-free
  • Emulsifier-free and biomimetic, aligning with skin’s natural physiology

Why This Product Matters

Corrective Serums are essential for achieving visible, targeted results. Concentrated actives in advanced delivery systems penetrate deeper layers of the skin to address varying concerns from hyperpigmentation, dehydration, signs of aging, inflammation, acne and more. By delivering ingredients directly where they are needed, O COSMEDICS Corrective Serums optimise cellular function, accelerate visible improvements and support long-term skin health, making them a vital step in every skincare routine.

Pairs Well With

Why Others Love It

FAQs

4D Hyaluronic Serum is suitable for all skin types, including sensitive, dehydrated and dry skin. It’s ideal for anyone seeking multi-layer hydration, improved skin bounce and a smoother, plumper-looking complexion.

The serum uses four advanced forms of Sodium Hyaluronate to create a three-dimensional hydration network. Each type targets a different level of the skin, helping to reduce water loss while delivering instant and long-lasting moisture support.

Yes. By supporting hydration across multiple layers of the skin, 4D Hyaluronic Serum helps plump the appearance of fine lines and wrinkles, improve visible elasticity and leave skin looking smoother, softer and more supple over time.

Absolutely. Its lightweight water-gel formulation supports hydration and barrier function without overwhelming the skin, making it a beautiful choice for sensitive, dehydrated or compromised skins needing comfort.

For best results, use morning and evening on cleansed skin. Massage gently until fully absorbed before layering other correctors, hydrators, oils and SPF.

Yes. Its lightweight, hydrating formula is gentle enough for use around the delicate eye area, helping to soften the look of dryness lines and support a smoother, fresher-looking eye contour.

Results are completely dependent on the level of dehydration and barrier impairment present in the skin. Many users notice skin feels more hydrated, supple and plump within days, while visible improvements in texture, bounce and smoothness develop with consistent use over several weeks.

4D Hyaluronic Serum combines four types of Sodium Hyaluronate, including ultra-high, high, adsorptional and ultra-low molecular weight forms. This allows it to hydrate the skin surface, support the stratum corneum, reduce moisture loss and deliver hydration deeper within the skin for a more complete plumping effect.