Guide · Korean skincare
Korean Vitamin C Skincare Routine: Cleanse, Mask, Brighten
A simple three-step Korean routine built around vitamin C — what to use, in what order, and how often. Every product in this guide is available on Amazon.com.
Why vitamin C belongs in your routine
Vitamin C (ascorbic acid) is one of the most widely used antioxidants in skincare, known for helping skin look brighter and more even when used consistently. Pure ascorbic acid is also sensitive to water and air, so the way a product is formulated and packaged matters as much as the percentage on the label.
Korean skincare layers several light, targeted steps instead of one heavy product. Applied to vitamin C, that means cleansing with a gentle exfoliating wash, giving skin a concentrated essence with a sheet mask, and sealing in a stabilized vitamin C serum — the routine below.
The 3-step Korean vitamin C routine
Step 1 — Cleanse
Start with an enzyme powder wash
Vitamin C works best on clean skin. A powder cleanser is a Korean favorite because the formula stays dry and fresh until you add water. The UNI&CORE Vita C Enzyme Powder Wash turns into a creamy foam and uses papain, bromelain and lipase enzymes — plus vitamin C (ascorbic acid) and curcumin — to clear away dead skin cells, excess sebum and impurities without harsh scrubbing.
It is mildly acidic, at pH 5–5.5, so it suits daily use. Tear open one 1 g packet, lather with a little water, massage and rinse.
When: Morning or evening, daily
Step 2 — Mask
Add a vitamin C sheet mask
Sheet masks are the Korean shortcut to a visible glow. The UNI&CORE Vita C Super Brightening Mask carries an essence with 2% pure vitamin C, glutathione and Inula britannica flower extract on a 100% TENCEL™ high-adherence sheet that hugs the skin.
After cleansing, apply the mask with the darker side facing out, remove it after 10–20 minutes, and pat the remaining essence in. It is a natural fit before events or as a weekly brightening ritual.
When: 10–20 minutes, as often as you like a boost
Step 3 — Brighten
Finish with a 13.5% vitamin C serum ampoule
An ampoule is a concentrated serum. The UNI&CORE Vita C 13.5 Super Brightening Ampoule contains 13.5% pure vitamin C (ascorbic acid), stabilized in a dual-layer formula, with glutathione, camu camu, hyaluronic acid and panthenol.
Apply 2 pumps over the face after cleansing (and after the mask, if you used one), avoiding the eye area, then follow with cream. In a 7-day human application test with 21 adults, skin glow improved by 35.6% and elasticity by 14.3%.* In the morning, always finish with sunscreen.
When: Morning and/or evening, 2 pumps
*Human application test after 7 days of use, 21 adults aged 20–60, SKINMED Co., Ltd. Clinical Trial Centre, as published by UNI&CORE. Individual results may vary. These products are cosmetics and are not intended to diagnose, treat, cure or prevent any disease.
Tips for using vitamin C
Order matters
Go from thinnest to thickest: cleanser → sheet mask essence → vitamin C serum → moisturizer → sunscreen (morning).
Wear sunscreen with vitamin C
Vitamin C fits a morning routine well, but any brightening routine needs a broad-spectrum sunscreen during the day.
Sensitive skin? Ease in
UNI&CORE recommends prepping with a toner before the ampoule for the first two weeks, then trying it right after cleansing. Patch test anything new.
Expect a yellow tint
Pure vitamin C formulas with turmeric and beta-carotene are naturally yellow and can transfer to pillowcases, so let the ampoule absorb before bed.
Vitamin C routine FAQ
What is the correct order for a vitamin C skincare routine?
Cleanse first, then use a sheet mask if you're masking, then your vitamin C serum or ampoule, then moisturizer. In the morning, finish with sunscreen.
Should I use vitamin C serum in the morning or at night?
Either works. Many people prefer the morning because vitamin C pairs well with sunscreen. The UNI&CORE Vita C 13.5 ampoule can be used morning and evening.
How often should I use a vitamin C sheet mask?
Use it whenever your skin needs a brightening boost — for example before an event or once or twice a week. Each mask stays on for 10–20 minutes.
Can I use an enzyme cleanser every day?
Yes. The UNI&CORE Vita C Enzyme Powder Wash exfoliates with enzymes rather than harsh scrubbing and is mildly acidic (pH 5–5.5), so it is made for everyday use.
Where can I buy the UNI&CORE vitamin C routine in the US?
All three products are sold on Amazon.com through the official UNI&CORE listings. Use the Shop on Amazon buttons in this guide.