Naturium Quadruple Hyaluronic Acid Serum 5% — 2 oz Hydrating & Plumping, Fragrance-Free

Naturium Quadruple Hyaluronic Acid Serum 5% is a fragrance-free, gel-like facial serum that uses four molecular weights of hyaluronic acid to deeply hydrate and visibly plump skin.

This serum blends very low, low, medium and high molecular weight pure hyaluronic acid in a 5% concentration to draw and lock moisture across different skin layers. The lightweight gel texture sinks in quickly, leaving a smooth base for moisturizers and makeup without a sticky finish. The formula is pH-balanced (approx. 5.85–6.5), dermatologist-tested, and free from synthetic fragrance, parabens, gluten, and animal-derived ingredients.

How does this serum hydrate different layers of the skin?

The four molecular weights each target hydration at varying depths: smaller molecules penetrate further while larger ones retain moisture at the surface. This multi-tier approach supports both immediate surface hydration and longer-lasting internal moisture retention. The result is skin that looks and feels plumper, softer, and more resilient.

• Very low and low weight HA: helps bind water deeper in the epidermis.
• Medium weight HA: supports moisture within mid-level skin layers.
• High weight HA: forms a hydrating film on the skin’s surface.
• 5% total HA: concentrated yet formulated for skin compatibility.

Will this serum work with my current routine and skin type?

Yes—this serum is designed to layer well with other skincare: apply it after cleansing and before heavier creams, both morning and night. Its gentle, fragrance-free formula suits a wide range of skin types including dry, combination, oily, sensitive, and aging skin. Patch testing is recommended for those with highly reactive skin.

• Use after toner or essence, before moisturizer and sunscreen.
• Suitable for daily use—morning and evening.
• Pairs well with actives like niacinamide and vitamin C when applied thoughtfully.
• Patch test advice for very reactive skin types.

How should I apply the Naturium Quadruple Hyaluronic Acid Serum for best results?

Shake the bottle, dispense a few drops onto fingertips, and gently smooth over face, neck, and chest while skin is slightly damp for optimal absorption. Follow with a moisturizer to lock in hydration and, in the morning, apply sunscreen as the final step. Consistent daily use helps maintain plumpness and a smoother skin texture over time.

• Apply to clean, slightly damp skin for improved absorption.
• Use 2–3 drops for face and neck; spread evenly without rubbing harshly.
• Layer moisturizer afterward to seal moisture in place.
• In morning routine, finish with broad-spectrum SPF.

Is the formula safe and what are the key formulation points?

The serum is formulated to be pH-appropriate and dermatologically tested, minimizing irritation risk while delivering active hydration. It’s vegan, cruelty-free, paraben-free, and most of Naturium’s skincare is free from synthetic fragrance. The gel-like consistency provides a non-greasy finish that works as a smooth canvas under makeup.

• Vegan and cruelty-free formulation.
• Paraben-free, gluten-free, and largely fragrance-free.
• pH level around 5.85–6.5 for skin compatibility.
• Dermatologist-tested; patch test recommended.

Who is this for: This 2 oz jumbo bottle is ideal for anyone seeking concentrated hydration—those with dry or aging skin who want plumping moisture, people building a preventative anti-aging routine, and multi-person households that prefer a larger, cost-effective size. It’s also a solid addition for anyone who wants a fragrance-free, dermatologically considerate hyaluronic acid serum that layers easily in everyday skincare.