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$53.00
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Restore the look of skin radiance in just 7 days* with cult-favorite C-Tetra.
Formulated with a stabilized form of vitamin C (7%) called tetrahexyldecyl ascorbate, this lightweight serum works to visibly brighten uneven skin tone and reduc...
Reviews
4.7
483 ratings
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Gentle Vitamin C Serum for a Beautiful Glow
C-Tetra has become one of my favorite vitamin C serums. It feels lightweight, gentle, and gives my skin a healthy glow without irritation. My complexion looks brighter and more even, and it layers perfectly under moisturizer and makeup. Great for anyone wanting radiant skin without a greasy feel
M
Maria · May 28, 2026
A great vitamin C serum for brighter, healthier-looking skin.
I’ve been using Medik8 C-Tetra and really love how lightweight and comfortable it feels on the skin. It absorbs quickly, gives a healthy radiant glow, and makes my complexion look fresher and more even over time. My skin feels smoother, hydrated, and more energized in the mornings. It’s gentle enough for daily use and layers well with other skincare products.
I
Iryna · May 23, 2026
C-Tera
I love this stuff! I just got my friend hooked on it too. I love how soft it feels and how amazing it smells. It also has helped so much with my dull skin.
