Sunday Riley C.E.O. 15% Vitamin C Brightening Serum

THD Ascorbate is a highly stable, oil-soluble, and advanced form of Vitamin C. It is preferred for its superior ability to penetrate the skin and deliver potent antioxidant and brightening benefits without the irritation sometimes associated with other forms of Vitamin C.

For best results, apply the serum once or twice daily, morning and/or night, after cleansing and before moisturizing. If you have sensitive skin, start with once a day or every other day.

Yes, the serum contains phytosterols which help to reduce the look of skin sensitivity. However, as with any active ingredient, it's recommended to do a patch test on a small area of skin before full face application, especially if you have highly sensitive skin.

Saccharide Isomerate is a plant-derived complex that helps to diminish the appearance of pores and significantly reinforces the skin's natural moisture barrier, leading to a smoother, more hydrated complexion.

Yes, the Sunday Riley C.E.O. Rapid Flash Brightening Serum is formulated to be fragrance-free, making it suitable for those who are sensitive to fragrances in skincare products.

While usage varies, a 30ml bottle typically lasts approximately 1-2 months with consistent daily use, depending on the amount applied per application.

It is generally safe to incorporate this Vitamin C serum into a routine with other actives. However, to avoid potential irritation, it's often recommended to use Vitamin C in the morning and other actives like retinoids or strong AHAs in the evening. Introduce new products slowly and observe your skin's reaction.

Reduce usage to every other day or mix a smaller amount with your moisturizer until your skin adjusts. Always perform a patch test before full application.

Consistent daily (or every other day) use is key for visible results. Skin cell turnover and pigment reduction take time. Expect improvements over several weeks of regular application.

Ensure your skin is clean and dry before application. Use only a few drops; applying too much can lead to stickiness. Allow adequate time for absorption before layering other products.