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Kiehl's Retinol Skin-Renewing Daily Micro-Dose Serum scores 9.0/9.8 vs IOPE Expert Retinol Serum Hydrogel Face Mask for Firming at 7.9/9.8. Kiehl's Retinol Skin-Renewing Daily Micro-Dose Serum wins for active ingredients.
Kiehl's Retinol Skin-Renewing Daily Micro-Dose Serum takes this one, winning 2 of 5 attributes.
Scores last verified: June 2026
37 unique
9 in common
33 unique
Where Kiehl's Retinol Skin-Renewing Daily Micro-Dose Serum really shines is active ingredient strength, scoring 7.8 compared to IOPE Expert Retinol Serum Hydrogel Face Mask for Firming's 5.0. 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 Retinol Skin-Renewing Daily Micro-Dose Serum scores 9.6 here versus 7.5 for IOPE Expert Retinol Serum Hydrogel Face Mask for Firming. 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 iOPE Expert Retinol Serum Hydrogel Face Mask for Firming relies on Niacinamide, Chondrus Crispus Extract, and Pyrus Communis (Pear) Fruit Extract. Both approaches have merit, but the positioning and supporting ingredients make the difference.
IOPE Expert Retinol Serum Hydrogel Face Mask for Firming is better if you have
Kiehl's Retinol Skin-Renewing Daily Micro-Dose Serum is better if you have
At budget pricing with a score of 7.9, IOPE Expert Retinol Serum Hydrogel Face Mask for Firming is a decent pick. Kiehl's Retinol Skin-Renewing Daily Micro-Dose Serum sits at the premium level with a 9.0 score — the higher investment pays off in formulation quality.
Kiehl's Retinol Skin-Renewing Daily Micro-Dose Serum wins this comparison with a meaningfully stronger ingredient profile and overall score.
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.
Yes, they share common ingredients. Check the ingredient face-off section above for a detailed comparison.
The key differences are in their active ingredients and formulation approach. Check the attribute battle above for a detailed breakdown.
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© 2026 Gracie. All rights reserved. Data sourced from Open Beauty Facts (ODbL) and EU CosIng.