Consumer & Clinical Trials: C-Tetra &
C-Tetra Luxe

Our bestselling vitamin C serums deliver visibly glowing, smoother and more even-looking skin while ensuring a luxurious sensorial experience. For those with particularly sensitive skin, C-Tetra is the perfect entry point to vitamin C use. For those looking for supercharged radiance and all-round skin health, choose C-Tetra Luxe.

Clinical & User Trials

Proven gentle, non-irritating formulas[1]

Achieve a healthy-looking glow in just 7 days[1]

Skin is visibly brighter & smoother in 7 days[1]

C-Tetra Claims

96% of sensitive skins agree C-Tetra is gentle on the skin[2]

Proven To:

✓ Achieve a healthy-looking glow in just 7 days[2]

✓ Soften and reduce the appearance of lines and wrinkles in 4 weeks[2]

✓ Visibly reduce dark spots in 4 weeks[2]

87%

of sensitive skins agree this is the most gentle vitamin C serum they have ever used[2]

94%

of sensitive skins agree C-Tetra is suitable for their skin type from first use[2]

90%

agree C-Tetra leaves skin feeling instantly softer[2]

C-Tetra Luxe Claims

86% reposted that it was the best vitamin C serum they had tried[3]

Clinically Proven To:

✓ Instantly improve skin radiance[3]

✓ Reduce the appearance of wrinkles in 4 weeks[3]

✓ Reduce hyperpigmentation in 4 weeks[3]

81%

agree that visible hyperpigmentation & dark spots have reduced in 4 weeks[3]

94%

noticed smoother and softer skin after just 1 use[3]

90%

women saw visibly even skin tone in 4 weeks.[3]

Shop C-Tetra or C-Tetra Luxe

C-Tetra®
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25% Off

C-Tetra®

Lipid 7% Vitamin C Radiance Serum

30ml/ 8ml / £29.25

C-Tetra® Luxe
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25% Off

C-Tetra® Luxe

Lipid 14% Vitamin C Enhanced Radiance Serum

30ml / 8 ml / £44.25

[1]Proven via independent consumer study conducted over 4 weeks on 52 participants with sensitive skin and via independent clinical study on C-Tetra Luxe conducted over 4 weeks on 36 participants
[2]Proven via independent consumer study conducted over 4 weeks on 52 participants with sensitive skin.
[3]Proven via independent clinical study on C-Tetra Luxe conducted over 4 weeks on 36 participants