Dear, Klairs EGF Blue Youth Activating Drop
By Nur → Last verified 10/5/2026
Price checked 10/5/2026
Verified 2026-10-05 on YesStyle: $20.99 (list $29.99; FLASH SALE — 30% OFF). Prices change often, so confirm on the retailer's page.
Affiliate links: we may earn a commission at no extra cost to you.
What we found
Based on how this product compares to others in the serums category, cross-referenced against retailer listings and market data.
Strengths
- + Contains adenosine
Worth knowing
- - Formerly sold as Midnight Blue Youth Activating Drop; also available in 10 mL and 50 mL, and this entry is the 20 mL size
Key ingredients
These are the ingredients Dear, Klairs highlights for this product, cross-checked against general dermatological and cosmetic-chemistry sources, not a full INCI list.
Fragrance: No fragrance or essential oil appears in the ingredient list on file; brand confirmation pending.
| Ingredient | What it is | What it does for skin |
|---|---|---|
| Adenosine | A compound naturally present in skin cells, used in skincare as an anti-aging active. | Recognized by South Korea's MFDS as a functional anti-wrinkle ingredient at 0.04% concentration, based on clinical studies showing measurable fine-line improvement; a real but modest effect, not a retinoid substitute. |
What the brand says
Dear, Klairs's own marketing claims, not our own findings.
- EGF and bFGF peptides in a watery first-serum format for sensitive skin
- Guaiazulene for the signature blue color and a soothing feel
- Watery texture that absorbs quickly with no heavy finish
- No added fragrance; vegan
- Visibly more even after 4 weeks (post-blemish look)
Research-Based
Our assessment comes from pricing, ingredients, and published information, not personal use, the same standard we apply across the site. This product hasn't been hands-on tested yet. See our Methodology for what that distinction means.
Price history
Current price is the lowest we've recorded so far.
Cheaper alternatives in serums
More serums you may like
Frequently asked
How much does Dear, Klairs EGF Blue Youth Activating Drop cost per mL?
$1.05 per mL (currently $20.99 for 20 mL).
Has Dear, Klairs EGF Blue Youth Activating Drop been hands-on tested?
Not yet. Our assessment for this product comes from pricing, ingredients, and published information, not personal use, the same standard we apply across the site. See our Methodology for what that distinction means.
What are the key ingredients in Dear, Klairs EGF Blue Youth Activating Drop?
The ingredients Dear, Klairs highlights for this product include Adenosine.
Sources
Pricing and availability for this product were verified against the following retailer listings.