Your skin has a literal schedule. It defends by day, repairs by night.
Using the same serum for both is like wearing a raincoat to bed — pointless and uncomfortable. The AM/PM split is the single most effective tweak you can make.
Sunday Riley’s C.E.O. 15% Vitamin C Brightening Serum. $85. The promise of a glow that doesn’t rely on shimmer or sweat.
THD Ascorbate
Stable, oil-soluble vitamin C that doesn’t oxidize in the bottle before you finish it.
Squalane Base
Absorbs in under 30 seconds — zero sticky residue under sunscreen.
The Scent
Smells like a fresh-cut tangerine, not a chemical lab. A shockingly pleasant wake-up.
It’s not just vitamin C. The formula is built for daytime damage control. Antioxidant alliance.
- 15% THD Ascorbate: Oil-soluble, stable vitamin C that penetrates deeply
- Alpha Hydroxy Acids (AHAs): Gently exfoliate to brighten on the surface
- Squalane: Hydrates without clogging pores
- Ginger Extract: Calms inflammation that leads to redness
Texture is a silky, pale yellow milk. Sinks in with a faint citrus warmth — feels like your skin is drinking it.
By week two, my foundation stopped clinging to dry patches. The surprise? It plays nice with every sunscreen I own. No pilling.
Measurably brighter, more even tone in 3 weeks. My post-acne marks faded faster. Did it erase my fine lines? No. But they look softer, less shadowy.
This is the definitive morning serum. It makes the AM/PM theory actually work in practice.