Dear, Klairs Freshly Juiced Vitamin Drop
A low-strength pure ascorbic acid serum, pitched for years as the beginner's vitamin C and still one of the most sensible entry points in the category. Pure ascorbic acid is the form with the strongest evidence behind it for the appearance of tone and brightness; at this level the trade is less irritation for slower, subtler change. The texture is slightly thick and takes a moment to sink in, which is typical of a water-based ascorbic acid formula.
What it is built around
Who it suits
Normal, dry and combination skin starting with vitamin C, and reasonably sensitive skin that cannot take a high-strength serum. Good for the look of dullness and lingering post-blemish marks. Anyone already comfortable on a stronger ascorbic acid will find this underpowered. It is not the answer to deep pigmentation, and it is not a substitute for sunscreen in any routine.
How to use it
Morning, on clean dry skin, before moisturiser and sunscreen. A few drops, then a minute to settle. Start every other day and go daily if your skin is comfortable. Keep it somewhere cool and dark. Do not pair it with a retinoid or strong acids in the same session; put them at opposite ends of the day.
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🙋 People also ask
Can you use vitamin C and niacinamide together?
Yes, current understanding is that vitamin C and niacinamide can be used together safely, and many Korean formulas combine them. The old warning that they cancel out is largely outdated. If your skin is sensitive, you can still apply them at different times of day to be cautious.
Can I use vitamin C and retinol together?
Not in the same layer, but easily in the same routine — vitamin C in the morning, retinol at night. That split suits both: vitamin C partners with sunscreen, and retinoids are degraded by light.
✍️ Written & reviewed by the KoreaPlus Editorial team — dermatologist-informed, cosmetic-science researched & source-cited. Last reviewed: 2026-08-23.
General educational information using cosmetic structure-function wording — not medical advice. Always patch-test new actives. © KoreaPlus.