Loading...
Kiehl's Retinol Skin-Renewing Daily Micro-Dose Serum scores 9.0/9.8 vs Dr. Idriss Left Un-Red Reducer Face Serum for Redness and Blemish Prone Skin at 7.6/9.8. 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
27 unique
7 in common
35 unique
Where Kiehl's Retinol Skin-Renewing Daily Micro-Dose Serum really shines is active ingredient strength, scoring 7.8 compared to Dr. Idriss Left Un-Red Reducer Face Serum for Redness and Blemish Prone Skin's 3.6. 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 Dr. Idriss Left Un-Red Reducer Face Serum for Redness and Blemish Prone Skin. 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 dr. Idriss Left Un-Red Reducer Face Serum for Redness and Blemish Prone Skin relies on Potassium Azeloyl Diglycinate, Azelaic Acid, and Salix Alba (Willow) Bark Extract. Both approaches have merit, but the positioning and supporting ingredients make the difference.
Dr. Idriss Left Un-Red Reducer Face Serum for Redness and Blemish Prone Skin is better if you have
Kiehl's Retinol Skin-Renewing Daily Micro-Dose Serum is better if you have
Both sit in the premium bracket, so value comes down to formulation quality. Kiehl's Retinol Skin-Renewing Daily Micro-Dose Serum gets the nod here with its 9.0 overall score — you're getting more for a similar outlay.
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.
Some links on this site are affiliate links. We may earn a commission from purchases made through our links, at no extra cost to you. This helps us keep Gracie free and independent.
© 2026 Gracie. All rights reserved. Data sourced from Open Beauty Facts (ODbL) and EU CosIng.