COSRX The Blue Peptide Bakuchiol Plump Glow Serum vs Kiehl's Retinol Skin-Renewing Daily Micro-Dose Serum
COSRX The Blue Peptide Bakuchiol Plump Glow Serum scores 9.0/9.8 and Kiehl's Retinol Skin-Renewing Daily Micro-Dose Serum scores 8.9/9.8 — a near-tie where your skin type decides the winner.
Head to head
The Blue Peptide Bakuchiol Plump Glow Serum
Retinol Skin-Renewing Daily Micro-Dose Serum
Score comparison
These two are neck and neck — just 0.1 points apart.
Scores last verified: July 2026
Attribute battle
Hydration Efficacy
TIEIrritation Risk
TIEActive Ingredient Strength
COSRX WINSIngredient Transparency
TIEFormulation Safety
TIEIngredient face-off
21% overlapOnly in COSRX The Blue Peptide Bakuchiol Plump Glow Serum
27 unique
Shared ingredients
9 in common
Only in Kiehl's Retinol Skin-Renewing Daily Micro-Dose Serum
33 unique
Why these two are neck and neck
These two serums take different paths to a similar destination. Both formulas include solid hydrating ingredients, and the overall scores reflect that — the gap here is genuinely slim.
COSRX The Blue Peptide Bakuchiol Plump Glow Serum brings Niacinamide, Bakuchiol, and Adenosine as actives, while kiehl's Retinol Skin-Renewing Daily Micro-Dose Serum relies on Niacinamide, Acetyl Dipeptide-1 Cetyl Ester, and Adenosine. Both approaches have merit, but the positioning and supporting ingredients make the difference.
Best for your skin type
COSRX The Blue Peptide Bakuchiol Plump Glow Serum is better if you have
- Sensitive skin — the low-irritation formula keeps things gentle
- Dry or dehydrated skin that craves moisture, thanks to Butylene Glycol
- Targeting specific concerns like aging or uneven tone — Niacinamide does the heavy lifting
Kiehl's Retinol Skin-Renewing Daily Micro-Dose Serum is better if you have
- Sensitive skin — the low-irritation formula keeps things gentle
- Dry or dehydrated skin that craves moisture, thanks to Glycerin
- Targeting specific concerns like aging or uneven tone — Niacinamide does the heavy lifting
Value comparison
At mid-range pricing with a score of 9.0, COSRX The Blue Peptide Bakuchiol Plump Glow Serum delivers strong value. Kiehl's Retinol Skin-Renewing Daily Micro-Dose Serum sits at the premium level with a 8.9 score — the extra cost doesn't translate to better scores here.
Our verdict
It's a close call — both products score within 0.3 points of each other. Your choice depends on your specific skin concerns.
Frequently asked questions
Which is better: COSRX The Blue Peptide Bakuchiol Plump Glow Serum or Kiehl's Retinol Skin-Renewing Daily Micro-Dose Serum?
Based on ingredient analysis, COSRX The Blue Peptide Bakuchiol Plump Glow Serum scores higher overall. See the full score breakdown above for details on each attribute.
Do COSRX The Blue Peptide Bakuchiol Plump Glow Serum and Kiehl's Retinol Skin-Renewing Daily Micro-Dose Serum share ingredients?
Yes, they share common ingredients. Check the ingredient face-off section above for a detailed comparison.
What's the main difference between COSRX The Blue Peptide Bakuchiol Plump Glow Serum and Kiehl's Retinol Skin-Renewing Daily Micro-Dose Serum?
The key differences are in their active ingredients and formulation approach. Check the attribute battle above for a detailed breakdown.