Kiehl's Retinol Skin-Renewing Daily Micro-Dose Serum vs numbuzin No. 9 NAD Bio Lifting-sil Essence
Kiehl's Retinol Skin-Renewing Daily Micro-Dose Serum scores 8.9/9.8 and numbuzin No. 9 NAD Bio Lifting-sil Essence scores 8.9/9.8 — a near-tie where your skin type decides the winner.
Head to head
Retinol Skin-Renewing Daily Micro-Dose Serum
No. 9 NAD Bio Lifting-sil Essence
Score comparison
These two are neck and neck — just 0.0 points apart.
Scores last verified: July 2026
Attribute battle
Hydration Efficacy
TIEIrritation Risk
TIEActive Ingredient Strength
numbuzin WINSIngredient Transparency
numbuzin WINSFormulation Safety
TIEIngredient face-off
16% overlapOnly in Kiehl's Retinol Skin-Renewing Daily Micro-Dose Serum
30 unique
Shared ingredients
12 in common
Only in numbuzin No. 9 NAD Bio Lifting-sil Essence
64 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.
Ingredient Transparency is another area of separation. numbuzin No. 9 NAD Bio Lifting-sil Essence scores 8.8 here versus 8.5 for Kiehl's Retinol Skin-Renewing Daily Micro-Dose Serum. That difference comes down to how each formula is built — the ingredient list tells the story.
Kiehl's Retinol Skin-Renewing Daily Micro-Dose Serum brings Niacinamide, Acetyl Dipeptide-1 Cetyl Ester, and Adenosine as actives, while numbuzin No. 9 NAD Bio Lifting-sil Essence relies on Niacinamide, Adenosine, and Tocopherol. Both approaches have merit, but the positioning and supporting ingredients make the difference.
Best for your skin type
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
numbuzin No. 9 NAD Bio Lifting-sil Essence 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 premium pricing with a score of 8.9, Kiehl's Retinol Skin-Renewing Daily Micro-Dose Serum is a decent pick. numbuzin No. 9 NAD Bio Lifting-sil Essence sits at the mid-range 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: Kiehl's Retinol Skin-Renewing Daily Micro-Dose Serum or numbuzin No. 9 NAD Bio Lifting-sil Essence?
Based on ingredient analysis, Kiehl's Retinol Skin-Renewing Daily Micro-Dose Serum scores higher overall. See the full score breakdown above for details on each attribute.
Do Kiehl's Retinol Skin-Renewing Daily Micro-Dose Serum and numbuzin No. 9 NAD Bio Lifting-sil Essence share ingredients?
Yes, they share common ingredients. Check the ingredient face-off section above for a detailed comparison.
What's the main difference between Kiehl's Retinol Skin-Renewing Daily Micro-Dose Serum and numbuzin No. 9 NAD Bio Lifting-sil Essence?
The key differences are in their active ingredients and formulation approach. Check the attribute battle above for a detailed breakdown.