Kiehl's Since 1851 Micro-Dose Anti-Aging Retinol Serum with Ceramides & Peptide vs Mother Science Retinol Synergist Anti-Aging Treatment Serum with Malassezin + 0.3% Encapsulated Retinol
Kiehl's Since 1851 Micro-Dose Anti-Aging Retinol Serum with Ceramides & Peptide scores 9.3/9.8 and Mother Science Retinol Synergist Anti-Aging Treatment Serum with Malassezin + 0.3% Encapsulated Retinol scores 9.1/9.8 — a near-tie where your skin type decides the winner.
Head to head
Micro-Dose Anti-Aging Retinol Serum with Ceramides & Peptide
Retinol Synergist Anti-Aging Treatment Serum with Malassezin + 0.3% Encapsulated Retinol
Score comparison
These two are neck and neck — just 0.2 points apart.
Scores last verified: July 2026
Attribute battle
Hydration Efficacy
Kiehl's Since 1851 WINSIrritation Risk
TIEActive Ingredient Strength
Kiehl's Since 1851 WINSIngredient Transparency
TIEFormulation Safety
TIEIngredient face-off
21% overlapOnly in Kiehl's Since 1851 Micro-Dose Anti-Aging Retinol Serum with Ceramides & Peptide
31 unique
Shared ingredients
8 in common
Only in Mother Science Retinol Synergist Anti-Aging Treatment Serum with Malassezin + 0.3% Encapsulated Retinol
21 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.
Active Ingredient Strength is another area of separation. Kiehl's Since 1851 Micro-Dose Anti-Aging Retinol Serum with Ceramides & Peptide scores 7.7 here versus 6.4 for Mother Science Retinol Synergist Anti-Aging Treatment Serum with Malassezin + 0.3% Encapsulated Retinol. That difference comes down to how each formula is built — the ingredient list tells the story.
Kiehl's Since 1851 Micro-Dose Anti-Aging Retinol Serum with Ceramides & Peptide brings Niacinamide, Acetyl Dipeptide-1 Cetyl Ester, and Adenosine as actives, while mother Science Retinol Synergist Anti-Aging Treatment Serum with Malassezin + 0.3% Encapsulated Retinol relies on Retinol, Tocopherol, and Ceramide Np. Both approaches have merit, but the positioning and supporting ingredients make the difference.
Best for your skin type
Kiehl's Since 1851 Micro-Dose Anti-Aging Retinol Serum with Ceramides & Peptide 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
Mother Science Retinol Synergist Anti-Aging Treatment Serum with Malassezin + 0.3% Encapsulated Retinol is better if you have
- Sensitive skin — the low-irritation formula keeps things gentle
- Dry or dehydrated skin that craves moisture, thanks to Dimethyl Isosorbide
- Anyone who prefers clean, well-vetted formulations
Value comparison
At premium pricing with a score of 9.3, Kiehl's Since 1851 Micro-Dose Anti-Aging Retinol Serum with Ceramides & Peptide delivers strong value. Mother Science Retinol Synergist Anti-Aging Treatment Serum with Malassezin + 0.3% Encapsulated Retinol sits at the luxury level with a 9.1 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 Since 1851 Micro-Dose Anti-Aging Retinol Serum with Ceramides & Peptide or Mother Science Retinol Synergist Anti-Aging Treatment Serum with Malassezin + 0.3% Encapsulated Retinol?
Based on ingredient analysis, Kiehl's Since 1851 Micro-Dose Anti-Aging Retinol Serum with Ceramides & Peptide scores higher overall. See the full score breakdown above for details on each attribute.
Do Kiehl's Since 1851 Micro-Dose Anti-Aging Retinol Serum with Ceramides & Peptide and Mother Science Retinol Synergist Anti-Aging Treatment Serum with Malassezin + 0.3% Encapsulated Retinol 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 Since 1851 Micro-Dose Anti-Aging Retinol Serum with Ceramides & Peptide and Mother Science Retinol Synergist Anti-Aging Treatment Serum with Malassezin + 0.3% Encapsulated Retinol?
The key differences are in their active ingredients and formulation approach. Check the attribute battle above for a detailed breakdown.