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Kiehl's Retinol Skin-Renewing Daily Micro-Dose Serum scores 9.0/9.8 vs Saint Jane Beauty Star Flower Hydration Serum with Niacinamide and Hyaluronic Acid at 7.7/9.8. 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 3 of 5 attributes.
Scores last verified: June 2026
33 unique
9 in common
8 unique
Where Kiehl's Retinol Skin-Renewing Daily Micro-Dose Serum really shines is active ingredient strength, scoring 7.8 compared to Saint Jane Beauty Star Flower Hydration Serum with Niacinamide and Hyaluronic Acid's 3.5. 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 8.5 for Saint Jane Beauty Star Flower Hydration Serum with Niacinamide and Hyaluronic Acid. 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 saint Jane Beauty Star Flower Hydration Serum with Niacinamide and Hyaluronic Acid relies on Niacinamide. Both approaches have merit, but the positioning and supporting ingredients make the difference.
Kiehl's Retinol Skin-Renewing Daily Micro-Dose Serum is better if you have
Saint Jane Beauty Star Flower Hydration Serum with Niacinamide and Hyaluronic Acid is better if you have
At premium pricing with a score of 9.0, Kiehl's Retinol Skin-Renewing Daily Micro-Dose Serum delivers strong value. Saint Jane Beauty Star Flower Hydration Serum with Niacinamide and Hyaluronic Acid sits at the luxury level with a 7.7 score — the extra cost doesn't translate to better scores here.
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.