C.E.O. 15% Vitamin C Brightening Serum — Reddit Reviews
by Sunday Riley
Updated August 22, 2026
15% THD vitamin C serum praised for brightening; very pricey with occasional use.
What the community says
A 15% tetrahexyldecyl ascorbate vitamin C serum with brightening focus and HG fans. Commonly used in AM routines or weekly vitamin C blends, though its cost limits everyday use for many. Packaging reduces oxidation, but price is a major deterrent.
What this means for you
What people love
- 15% stable THD vitamin C for brightening
- Packaging limits oxidation risk
- More affordable than some high-end vitamin C serums
Product details
Key Ingredients
Skin type data limited
Where to buy
Real Reddit threads — 8 mentions across 4 threads
Sunday Riley C.E.O. 15% Vitamin C Brightening Serum on Reddit, in one place — 4 threads from r/SkincareAddiction and r/30PlusSkinCare, summarized.
“On days when I don’t have time for the Senté mask, I use Sunday Riley CEO Vitamin C Serum before the azelaic acid serum.”
Positive
“I’ve also got some older hyperpigmentation I’m trying to lighten.”
Positive
“I just wanted to share my routine that has been working really well for me.”
Positive
“Sunday Riley CEO vitamin C serum is excellent, HG status for me”
Positive
“more affordable than Skinceuticals”
Positive
“The packaging is also better, much less risk of oxidation”
Positive
“Sunday Riley ceo”
Mentioned
“I second this”
Mentioned
“it’s probably the best option for most people”
Mentioned
“I think Sunday Riley C.E.O. 15% Vitamin C Brightening Serum and Biossance Squalane + Vitamin C Rose Oil are going to be the closest things”
Mentioned
“I think they're the same price, if not more expensive.”
Mentioned
“As far as Vitamin C serums with THD, I'm only aware of the following:”
Mentioned
