Your morning serum is a shield. Your night serum is a repair crew. Using the same one for both is like wearing a raincoat to bed — pointless and uncomfortable.
The real kicker? Vitamin C degrades in sunlight. Applying it at night is a waste of a very expensive ingredient.
This is Sunday Riley‘s C.E.O. 15% Vitamin C Brightening Serum. $85. I tried it because it claims to be stable and not gritty — a rare find.
THD Ascorbate
This is the stable, oil-soluble form of Vitamin C that doesn’t oxidize on your shelf.
Squalane Base
It’s in an oil, not water, so it feels like a treatment, not a juice.
Pump Packaging
Airless pump keeps the light and air out — no brown sludge in the bottle.
Photo: Chang Duong / Unsplash
At night, you need retinol or peptides. This serum is all about antioxidant protection and brightening for the day. Using it at night misses the repair window.
- 15% Vitamin C (THD Ascorbate): Fights free radicals from pollution/UV
- Squalane: Hydrating oil that doesn’t feel greasy
- Alpha Hydroxy Acids (Glycolic, Lactic): Gentle chemical exfoliation
- Ginger Extract: Soothing, helps with redness
Photo: Natallia Photo / Unsplash
Texture is a creamy, pale yellow oil. Absorbs in 20 seconds — leaves a satin finish, not an oil slick. Smells like a fresh orange, not a chemical lab.
By week two, my foundation stopped oxidizing (turning orange) on my chin. The surprise? It plays nice with my mineral sunscreen — no pilling.
Photo: Content Pixie / Unsplash
My post-acne marks faded faster. My skin looked more even by 11 AM. Did it erase my fine lines? No. That’s a night serum’s job.
Photo: Siora Photography / Unsplash
This is a brilliant morning serum. But it’s not a night treatment. Get it for your AM shield, then find a dedicated retinol for PM repair.