Guide · Korean skincare
Vitamin C and Glutathione: Why They're Paired in Skincare
More brightening formulas now list glutathione next to vitamin C. Here is why the two are paired, and how to use them in a simple routine.
Two antioxidants that work well together
Vitamin C (ascorbic acid) and glutathione are both antioxidants. In skincare they are paired for a brighter, more even-looking and radiant complexion, and to help skin handle everyday stress from pollution and sunlight. Formulators often describe them as complementary: each helps the other stay in its active form.
Evidence for specific synergy claims is still limited, so judge a product by its full formula, its vitamin C percentage and stability, and any published test results.
Where you'll find the pair
Both UNI&CORE vitamin C treatments list glutathione on the US label. The Vita C 13.5 ampoule pairs it with 13.5% pure vitamin C; the Vita C Super Brightening Mask pairs it with 2% pure vitamin C and Inula britannica flower extract in a sheet-mask essence.
13.5% Pure Vitamin C (Ascorbic Acid)
UNI&CORE Vita C 13.5 Super Brightening Ampoule
1.06 oz (30 g)
How to use vitamin C and glutathione
Use them after cleansing, before moisturizer. A sheet mask is a good occasional boost; a serum or ampoule is the daily step. In the morning always finish with a broad-spectrum sunscreen — without daily sun protection, no brightening routine can show its best.
2% Pure Vitamin C
UNI&CORE Vita C Super Brightening Mask
5 sheets × 0.56 oz (16 g)
FAQ
Can I use vitamin C and glutathione together?
Yes. They are commonly combined in one formula, and both UNI&CORE vitamin C products contain glutathione alongside pure vitamin C.
Should I use them in the morning or at night?
Either works. Many people prefer vitamin C in the morning under sunscreen. Follow your product's directions.
How long until I see results?
It varies. In UNI&CORE's 7-day human application test of the Vita C 13.5 ampoule, skin glow improved by 35.6% (21 adults; individual results may vary).
Where can I buy UNI&CORE vitamin C with glutathione?
On Amazon.com through the official UNI&CORE listings. Use the Shop on Amazon buttons in this guide.
Test results are from UNI&CORE's human application tests and may vary by individual. These products are cosmetics and are not intended to diagnose, treat, cure or prevent any disease.