1 / 6Midnight Blue Youth Activating Drop
A concentrated nighttime serum in Klairs' signature deep-blue color, pairing skin-calming guaiazulene with peptides aimed at firmness and renewal. The blue comes from the guaiazulene itself rather than a dye, and it rubs in clear to a light, non-greasy finish. It is meant as a gentle anti-aging step for skin that also runs sensitive or reactive.
More detail
The formula leads with two peptide and growth-factor ingredients (sh-oligopeptide-1 and sh-polypeptide-1) that are studied for supporting skin renewal and firmness, plus adenosine, a well-established anti-wrinkle ingredient, and antioxidant blueberry extract. Its striking midnight-blue color comes from guaiazulene, a compound derived from chamomile that also helps settle redness and irritation. The texture is a lightweight, slightly slippery serum that absorbs quickly without tackiness. Klairs designed it for evening use: after cleansing and toner, press a few drops over the face before your moisturizer. It is fragrance-free, essential-oil-free, and alcohol-free, which suits sensitive skin, but the peptides are active ingredients, so introduce it gradually and patch-test first, and note that the deep blue is natural, not an added dye.
Ingredient check⚠ 2 caution flags
Evidence checkGrade B · MFDS ✓
How grading works
What Korea says#36 serum
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Where to buybest total $25
| Retailer | Price | Ship + duty | Total | |
|---|---|---|---|---|
| Amazon ✓ official Official store — verify seller before launch Accepts: Visa · MC · Amex · Discover · Amazon Pay · Affirm | $25 | — | $25BEST | Shop → |
| Olive Young Global ✓ official Ships from Korea 7–14d · +15% duty Accepts: Cards · PayPal · Apple Pay · Alipay+ | $20 | $10.00 | $30 | Shop → |
| Klairs official ✓ official Brand's official store, ships from Korea · +15% duty Accepts: Cards · PayPal (varies) | $25 | $9.80 | $34.80 | Shop → |
Totals include estimated import duty on Korea-shipped orders (15%, post–de minimis). Links open retailer search; exact product links are coming at launch. Payment methods indicative — verify at checkout.
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