Kiehl's Since 1851 Micro-Dose Anti-Aging Retinol Serum with Ceramides & Peptide vs Then I Met You Renewing Rich Firming and Barrier Repair Cream with Ginseng and Squalane
Kiehl's Since 1851 Micro-Dose Anti-Aging Retinol Serum with Ceramides & Peptide scores 9.3/9.8 vs Then I Met You Renewing Rich Firming and Barrier Repair Cream with Ginseng and Squalane at 8.8/9.8. Kiehl's Since 1851 Micro-Dose Anti-Aging Retinol Serum with Ceramides & Peptide wins for active ingredients.
Head to head
Micro-Dose Anti-Aging Retinol Serum with Ceramides & Peptide
Renewing Rich Firming and Barrier Repair Cream with Ginseng and Squalane
Score comparison
Kiehl's Since 1851 Micro-Dose Anti-Aging Retinol Serum with Ceramides & Peptide edges ahead, winning 1 of 5 attributes.
Scores last verified: July 2026
Attribute battle
Hydration Efficacy
Kiehl's Since 1851 WINSIrritation Risk
TIEActive Ingredient Strength
Then I Met You WINSIngredient Transparency
TIEFormulation Safety
TIEIngredient face-off
21% overlapOnly in Kiehl's Since 1851 Micro-Dose Anti-Aging Retinol Serum with Ceramides & Peptide
29 unique
Shared ingredients
10 in common
Only in Then I Met You Renewing Rich Firming and Barrier Repair Cream with Ginseng and Squalane
38 unique
Why Kiehl's Since 1851 Micro-Dose Anti-Aging Retinol Serum with Ceramides & Peptide comes out ahead
Where Kiehl's Since 1851 Micro-Dose Anti-Aging Retinol Serum with Ceramides & Peptide really shines is active ingredient strength, scoring 7.7 compared to Then I Met You Renewing Rich Firming and Barrier Repair Cream with Ginseng and Squalane's 9.3. Its formula features Niacinamide, Acetyl Dipeptide-1 Cetyl Ester, and Adenosine in high positions, signalling meaningful concentrations.
Hydration Efficacy is another area of separation. Kiehl's Since 1851 Micro-Dose Anti-Aging Retinol Serum with Ceramides & Peptide scores 9.4 here versus 8.8 for Then I Met You Renewing Rich Firming and Barrier Repair Cream with Ginseng and Squalane. 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 then I Met You Renewing Rich Firming and Barrier Repair Cream with Ginseng and Squalane relies on Niacinamide, Panax Ginseng Root Extract, and Centella Asiatica Extract. 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
Then I Met You Renewing Rich Firming and Barrier Repair Cream with Ginseng and Squalane is better if you have
- Sensitive skin — the low-irritation formula keeps things gentle
- Dry or dehydrated skin that craves moisture, thanks to Propanediol
- Targeting specific concerns like aging or uneven tone — Niacinamide does the heavy lifting
Value comparison
Kiehl's Since 1851 Micro-Dose Anti-Aging Retinol Serum with Ceramides & Peptide comes in at premium pricing with a 9.3 score, which is solid value at that tier.
Our verdict
Kiehl's Since 1851 Micro-Dose Anti-Aging Retinol Serum with Ceramides & Peptide edges ahead with a slightly stronger formulation, but Then I Met You Renewing Rich Firming and Barrier Repair Cream with Ginseng and Squalane is still a solid pick.
Frequently asked questions
Which is better: Kiehl's Since 1851 Micro-Dose Anti-Aging Retinol Serum with Ceramides & Peptide or Then I Met You Renewing Rich Firming and Barrier Repair Cream with Ginseng and Squalane?
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 Then I Met You Renewing Rich Firming and Barrier Repair Cream with Ginseng and Squalane 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 Then I Met You Renewing Rich Firming and Barrier Repair Cream with Ginseng and Squalane?
The key differences are in their active ingredients and formulation approach. Check the attribute battle above for a detailed breakdown.