Everyone says vitamin C serums turn on the shelf. I left a bottle of SkinCeuticals C E Ferulic open on my counter for a month to see.
The real test isn’t the color—it’s whether it still works after oxidizing.
It’s the $182 serum every derm cites. The brand claims unparalleled stability and patented efficacy. I had to know if it was hype.
The Smell
Hot dog water. No one talks about it.
The Feel
Slightly oily slip—absorbs in 90 seconds.
The Bottle
Opaque, airless pump. No dropper contamination.
Photo: Kaeme / Unsplash
It’s not just vitamin C. It’s a specific 15% L-ascorbic acid formula at the correct acidic pH. Ferulic acid and vitamin E boost its power and stability exponentially.
- 15% L-ascorbic acid: The only form proven to penetrate skin
- 1% Vitamin E (alpha tocopherol): Doubles photoprotection
- 0.5% Ferulic acid: Boosts stability of C+E by 8x
- Hyaluronic Acid: A hint of hydration
Photo: Karly Jones / Unsplash
Texture is watery but not thin—leaves a faint, velvety film. Stings for 3 seconds on freshly washed skin.
By week three, my bottle’s liquid was light amber. But my morning skin looked brighter—not glowier, but more even. The oxidation fear felt overblown.
Photo: Content Pixie / Unsplash
My existing sunspots didn’t vanish. But new pigmentation from a pimple faded in 4 days. Skin looked fortified—less reactive.
The formula is shockingly resilient. The stability is real, even if the smell isn’t great.