C-Tetra Advanced
Out of stockA stable vitamin C serum for daily antioxidant protection.
£47.60
£56
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Find where this fits in your AM / PM routine.
Find my routineBest for
Anyone wanting daily antioxidant protection. Particularly suited to skin already using a retinoid, where a gentler vitamin C format is less likely to cause irritation.
How to use
Apply in the morning to clean skin, before moisturiser and sunscreen.
What to expect
Brightness within four to six weeks of consistent use. Pigmentation benefits are slower and depend on daily sun protection alongside it.
Skin type suitability
Key actives
Size or volume
30ml
Time of day
AM
Evidence level
Well establishedTopical vitamin C has consistent human trial evidence as an antioxidant and for improving the appearance of uneven tone. Stable, oil-soluble formulations are generally better tolerated than high-percentage L-ascorbic acid.
This level reflects published research on the key ingredients or product class. It does not mean this exact formulation has been independently proven, and it is not a medical endorsement or a guarantee of results.
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C-Tetra Advanced
£47.60