The Shelf · Vitamin C Serums: Find Your Percentage
No. 09 in Edit 007
Medik8 C-Tetra Advanced
A British lab with a Korean-grade obsession with stability. The vitamin C here is the lipid-soluble form chosen specifically because it does not fall apart in the bottle, which addresses the actual failure mode of most vitamin C ownership.
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Price and availability are set by Medik8.
Why we like the C-Tetra Advanced
- Stability treated as the headline feature
- Gentler entry into high-strength vitamin C
- Medik8's habit of publishing what things are
- Texture
- A light gel-serum
- Key ingredients
- Tetrahexyldecyl ascorbate 20% · Phyto exosomes
- Fragrance
- Not stated
- Best for
- Vitamin C without the sting · Mornings · People whose last vitamin C oxidized in the drawer
- Works on
- Dullness · Pigmentation · Early aging
- Made in
- United Kingdom
- Where to buy
- Medik8
- Price
- $72, approximate
- Listing checked
- 2026-08-26
Our verdict on the Medik8 C-Tetra Advanced
The vitamin C that keeps.
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Where the C-Tetra Advanced sits on The Shelf
The rest of Vitamin C Serums: Find Your Percentage
La Roche-Posay
Pure 12% Vitamin C Serum
The Ordinary
Ascorbyl Glucoside Solution 12%
Innisfree
Green Tea Enzyme Vitamin C Serum
Dear, Klairs
Freshly Juiced Vitamin Drop
Mad Hippie
Vitamin C Serum
Jumiso
All Day Vitamin Brightening & Balancing Facial Serum
Timeless Skin Care
20% Vitamin C + E Ferulic Acid Serum
SkinCeuticals
Serum 10
Paula's Choice
C15 Super Booster
RoC
Revive + Glow Daily Serum
Reviewed 2026-08-09. Medik8 C-Tetra Advanced appears in Vitamin C Serums: Find Your Percentage. Every product on The Shelf is listed in the product index.