Element Eight O₂ Niacinamide Multitasking Treatment Serum with Peptides and Hyaluronic Acid for Firming, Dark Spots, Pores and Hydration vs Kiehl's Retinol Skin-Renewing Daily Micro-Dose Serum
Element Eight O₂ Niacinamide Multitasking Treatment Serum with Peptides and Hyaluronic Acid for Firming, Dark Spots, Pores and Hydration scores 9.3/9.8 vs Kiehl's Retinol Skin-Renewing Daily Micro-Dose Serum at 8.9/9.8. Element Eight O₂ Niacinamide Multitasking Treatment Serum with Peptides and Hyaluronic Acid for Firming, Dark Spots, Pores and Hydration wins for hydration.
Head to head
O₂ Niacinamide Multitasking Treatment Serum with Peptides and Hyaluronic Acid for Firming, Dark Spots, Pores and Hydration
Retinol Skin-Renewing Daily Micro-Dose Serum
Score comparison
Element Eight O₂ Niacinamide Multitasking Treatment Serum with Peptides and Hyaluronic Acid for Firming, Dark Spots, Pores and Hydration edges ahead, winning 2 of 5 attributes.
Scores last verified: July 2026
Attribute battle
Hydration Efficacy
Kiehl's WINSIrritation Risk
TIEActive Ingredient Strength
Element Eight WINSIngredient Transparency
Element Eight WINSFormulation Safety
TIEIngredient face-off
21% overlapOnly in Element Eight O₂ Niacinamide Multitasking Treatment Serum with Peptides and Hyaluronic Acid for Firming, Dark Spots, Pores and Hydration
22 unique
Shared ingredients
9 in common
Only in Kiehl's Retinol Skin-Renewing Daily Micro-Dose Serum
33 unique
Why Element Eight O₂ Niacinamide Multitasking Treatment Serum with Peptides and Hyaluronic Acid for Firming, Dark Spots, Pores and Hydration comes out ahead
Where Element Eight O₂ Niacinamide Multitasking Treatment Serum with Peptides and Hyaluronic Acid for Firming, Dark Spots, Pores and Hydration really shines is hydration efficacy, scoring 6.9 compared to Kiehl's Retinol Skin-Renewing Daily Micro-Dose Serum's 9.6. With Glycerin, Pentylene Glycol, and Sodium Hyaluronate in its top ingredients, Element Eight O₂ Niacinamide Multitasking Treatment Serum with Peptides and Hyaluronic Acid for Firming, Dark Spots, Pores and Hydration delivers stronger moisture-binding capability.
Active Ingredient Strength is another area of separation. Element Eight O₂ Niacinamide Multitasking Treatment Serum with Peptides and Hyaluronic Acid for Firming, Dark Spots, Pores and Hydration scores 8.8 here versus 7.8 for Kiehl's Retinol Skin-Renewing Daily Micro-Dose Serum. That difference comes down to how each formula is built — the ingredient list tells the story.
Element Eight O₂ Niacinamide Multitasking Treatment Serum with Peptides and Hyaluronic Acid for Firming, Dark Spots, Pores and Hydration brings Niacinamide, Acetyl Hexapeptide-8, and Pentapeptide-18 as actives, while kiehl's Retinol Skin-Renewing Daily Micro-Dose Serum relies on Niacinamide, Acetyl Dipeptide-1 Cetyl Ester, and Adenosine. Both approaches have merit, but the positioning and supporting ingredients make the difference.
Best for your skin type
Element Eight O₂ Niacinamide Multitasking Treatment Serum with Peptides and Hyaluronic Acid for Firming, Dark Spots, Pores and Hydration is better if you have
- Sensitive skin — the low-irritation formula keeps things gentle
- Targeting specific concerns like aging or uneven tone — Niacinamide does the heavy lifting
- Anyone who prefers clean, well-vetted formulations
Kiehl's Retinol Skin-Renewing Daily Micro-Dose Serum 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
Value comparison
At luxury pricing with a score of 9.3, Element Eight O₂ Niacinamide Multitasking Treatment Serum with Peptides and Hyaluronic Acid for Firming, Dark Spots, Pores and Hydration delivers strong value. Kiehl's Retinol Skin-Renewing Daily Micro-Dose Serum sits at the premium level with a 8.9 score — the extra cost doesn't translate to better scores here.
Our verdict
Element Eight O₂ Niacinamide Multitasking Treatment Serum with Peptides and Hyaluronic Acid for Firming, Dark Spots, Pores and Hydration edges ahead with a slightly stronger formulation, but Kiehl's Retinol Skin-Renewing Daily Micro-Dose Serum is still a solid pick.
Frequently asked questions
Which is better: Element Eight O₂ Niacinamide Multitasking Treatment Serum with Peptides and Hyaluronic Acid for Firming, Dark Spots, Pores and Hydration or Kiehl's Retinol Skin-Renewing Daily Micro-Dose Serum?
Based on ingredient analysis, Element Eight O₂ Niacinamide Multitasking Treatment Serum with Peptides and Hyaluronic Acid for Firming, Dark Spots, Pores and Hydration scores higher overall. See the full score breakdown above for details on each attribute.
Do Element Eight O₂ Niacinamide Multitasking Treatment Serum with Peptides and Hyaluronic Acid for Firming, Dark Spots, Pores and Hydration and Kiehl's Retinol Skin-Renewing Daily Micro-Dose Serum share ingredients?
Yes, they share common ingredients. Check the ingredient face-off section above for a detailed comparison.
What's the main difference between Element Eight O₂ Niacinamide Multitasking Treatment Serum with Peptides and Hyaluronic Acid for Firming, Dark Spots, Pores and Hydration and Kiehl's Retinol Skin-Renewing Daily Micro-Dose Serum?
The key differences are in their active ingredients and formulation approach. Check the attribute battle above for a detailed breakdown.