Ultra-Low Molecular Hyaluronic Acid SerumIsntree Ultra-Low Molecular Hyaluronic Acid Serum 50 ml (1.69 fl oz)

Fourteen forms of hyaluronic acid

This serum combines 14 hyaluronic acid molecules, from low to high molecular weight, to bring moisture to different layers of the skin. Its ultra-low molecular weight form measures 329 Da, which the brand says lets it sink in for longer-lasting hydration without stickiness.

Sea water from Ulleung Island

Sea water sourced from Ulleung Island adds natural minerals, which the brand says help the skin hold on to moisture. The light, fast-absorbing texture is designed for layering, so it fits under a moisturiser or between other serum steps.

Vegan formula and bottle size

The formula is vegan, with no animal-derived ingredients or fragrances, and is described as suitable for sensitive skin. It is made in Korea and comes in a 1.69 fl oz (about 50 ml) bottle, packaged at roughly 4 x 4 x 10.5 cm.

How to use

Apply a few drops to clean skin after toning, pressing gently into the face and neck. Follow with your moisturiser to finish the routine.

Before you choose

This is a lightweight hydrating serum, not a rich cream. For external use only. Keep away from your eyes, and keep out of the sight and reach of children. Do not leave in direct sunlight. Stop using if irritation occurs. Korean-market product: packaging may show Korean text.

Standard UK delivery: free on all orders. Estimated 2–3 working days after dispatch.

Express UK delivery: estimated 1–2 working days after dispatch. Free on orders over £75.

Please allow up to 2 working days for order processing; orders are often dispatched the next working day. Delivery times are estimates, not guarantees.

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