C-Tetra® Vitamin C [3] 100% showed a clinical

[3] 100% showed a clinical improvement in barrier function (Proven via independent clinical study conducted over 8 weeks on 29 participants with sensitive

including blemish-prone and oily skins

Expertly designed to be used following vitamin A (retinol or retinal) in the evening

Reveal younger-looking skin with just 1 tube of Crystal Retinal

C-Tetra® Vitamin C [3] 100% showed a clinicalRestore the look of skin radiance in just 7 days* with cult favourite C Tetra. Formulated with a stabilised form of vitamin C (7%) called tetrahexyldecyl ascorbate (pronounced 'tetra hexul deckul as CORR bate'), this lightweight serum works to visibly brighten uneven skin tone and reduce the look of fine lines and wrinkles, while remaining gentle on sensitive skin. Fortified with vitamin E, this antioxidant powerhouse also protects the skin against