Sunday Riley C.E.O. Vitamin C Serum

C.E.O. uses a gentler, oil-soluble form of vitamin C (THD ascorbate), aiming for brightness without the sting of pure L-ascorbic acid.

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Key features

15% THD ascorbate, a gentler form of vitamin C
Targets brightness and clarity
Antioxidant support against early signs of aging
Positioned for all skin types

Best for

Anyone wanting vitamin C brightening with less irritation risk than L-ascorbic acid.

Things to consider

THD ascorbate is less studied than L-ascorbic acid
The listing is light on detail
Wear sunscreen with any brightening routine

Verdict

HashMonkey score: 3.5/5 ★★★★★☆☆☆☆☆

Our editorial opinion, based on research into specs, owner feedback and expert reviews. Not hands-on testing, and not an Amazon customer rating.

A gentle, pleasant vitamin C for sensitive-leaning skin. If you tolerate stronger acids, C-Firma is more potent.

Consider instead

Drunk Elephant C-Firma Fresh Day Serum — Drunk Elephant C-Firma Fresh for potent L-ascorbic acid.

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Price and availability are shown on Amazon and may change.

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Reader questions

Common questions, answered by the HashMonkey team

Who is the Sunday Riley C.E.O. 15% Vitamin C Brightening Serum a good fit for?

Based on its published specs and features, the best fit is: Anyone wanting vitamin C brightening with less irritation risk than L-ascorbic acid. Check the product details on Amazon to confirm it fits your needs.

What should I consider before buying the Sunday Riley C.E.O. 15% Vitamin C Brightening Serum?

A few things to weigh. THD ascorbate is less studied than L-ascorbic acid. The listing is light on detail.

Is there an alternative to the Sunday Riley C.E.O. 15% Vitamin C Brightening Serum worth comparing?

Yes. Consider the Drunk Elephant C-Firma Fresh for potent L-ascorbic acid. Current price and availability are shown on Amazon and may change.

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