Which is better: Kiehl's Since 1851 Micro-Dose Anti-Aging Retinol Serum with Ceramides & Peptide or Saint Jane Beauty Star Flower Hydration Serum with Niacinamide and Hyaluronic Acid?

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 Saint Jane Beauty Star Flower Hydration Serum with Niacinamide and Hyaluronic Acid 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 Saint Jane Beauty Star Flower Hydration Serum with Niacinamide and Hyaluronic Acid?

The key differences are in their active ingredients and formulation approach. Check the attribute battle above for a detailed breakdown.

Kiehl's Since 1851 Micro-Dose Anti-Aging Retinol Serum with Ceramides & Peptide vs Saint Jane Beauty Star Flower Hydration Serum with Niacinamide and Hyaluronic Acid

Kiehl's Since 1851 Micro-Dose Anti-Aging Retinol Serum with Ceramides & Peptide scores 9.3/9.8 vs Saint Jane Beauty Star Flower Hydration Serum with Niacinamide and Hyaluronic Acid at 8.3/9.8. Kiehl's Since 1851 Micro-Dose Anti-Aging Retinol Serum with Ceramides & Peptide wins for active ingredients.

Kiehl's Since 1851

Micro-Dose Anti-Aging Retinol Serum with Ceramides & Peptide

serumpremium

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 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 Since 1851 Micro-Dose Anti-Aging Retinol Serum with Ceramides & Peptide scores 9.4 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 Since 1851 Micro-Dose Anti-Aging Retinol Serum with Ceramides & Peptide 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.

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

Saint Jane Beauty Star Flower Hydration Serum with Niacinamide and Hyaluronic Acid is better if you have

Sensitive skin — the low-irritation formula keeps things gentle
Dry or dehydrated skin that craves moisture, thanks to Butylene Glycol
Anyone who prefers clean, well-vetted formulations

Value comparison

At premium pricing with a score of 9.3, Kiehl's Since 1851 Micro-Dose Anti-Aging Retinol Serum with Ceramides & Peptide delivers strong value. Saint Jane Beauty Star Flower Hydration Serum with Niacinamide and Hyaluronic Acid sits at the luxury level with a 8.3 score — the extra cost doesn't translate to better scores here.

Kiehl's Since 1851 Micro-Dose Anti-Aging Retinol Serum with Ceramides & Peptide vs Saint Jane Beauty Star Flower Hydration Serum with Niacinamide and Hyaluronic Acid

Micro-Dose Anti-Aging Retinol Serum with Ceramides & Peptide

Star Flower Hydration Serum with Niacinamide and Hyaluronic Acid

Attribute battle

Hydration Efficacy

Irritation Risk

Active Ingredient Strength

Ingredient Transparency

Formulation Safety

Ingredient face-off

Only in Kiehl's Since 1851 Micro-Dose Anti-Aging Retinol Serum with Ceramides & Peptide

Shared ingredients

Only in Saint Jane Beauty Star Flower Hydration Serum with Niacinamide and Hyaluronic Acid

Why Kiehl's Since 1851 Micro-Dose Anti-Aging Retinol Serum with Ceramides & Peptide comes out ahead

Best for your skin type

Value comparison

Frequently asked questions

Which is better: Kiehl's Since 1851 Micro-Dose Anti-Aging Retinol Serum with Ceramides & Peptide or Saint Jane Beauty Star Flower Hydration Serum with Niacinamide and Hyaluronic Acid?

Do Kiehl's Since 1851 Micro-Dose Anti-Aging Retinol Serum with Ceramides & Peptide and Saint Jane Beauty Star Flower Hydration Serum with Niacinamide and Hyaluronic Acid share ingredients?

What's the main difference between Kiehl's Since 1851 Micro-Dose Anti-Aging Retinol Serum with Ceramides & Peptide and Saint Jane Beauty Star Flower Hydration Serum with Niacinamide and Hyaluronic Acid?

Kiehl's Since 1851 Micro-Dose Anti-Aging Retinol Serum with Ceramides & Peptide vs Saint Jane Beauty Star Flower Hydration Serum with Niacinamide and Hyaluronic Acid

Head to head

Micro-Dose Anti-Aging Retinol Serum with Ceramides & Peptide

Star Flower Hydration Serum with Niacinamide and Hyaluronic Acid

Score comparison

Attribute battle

Hydration Efficacy

Irritation Risk

Active Ingredient Strength

Ingredient Transparency

Formulation Safety

Ingredient face-off

Only in Kiehl's Since 1851 Micro-Dose Anti-Aging Retinol Serum with Ceramides & Peptide

Shared ingredients

Only in Saint Jane Beauty Star Flower Hydration Serum with Niacinamide and Hyaluronic Acid

Why Kiehl's Since 1851 Micro-Dose Anti-Aging Retinol Serum with Ceramides & Peptide comes out ahead

Best for your skin type

Value comparison

Our verdict

Frequently asked questions

Which is better: Kiehl's Since 1851 Micro-Dose Anti-Aging Retinol Serum with Ceramides & Peptide or Saint Jane Beauty Star Flower Hydration Serum with Niacinamide and Hyaluronic Acid?

Do Kiehl's Since 1851 Micro-Dose Anti-Aging Retinol Serum with Ceramides & Peptide and Saint Jane Beauty Star Flower Hydration Serum with Niacinamide and Hyaluronic Acid share ingredients?

What's the main difference between Kiehl's Since 1851 Micro-Dose Anti-Aging Retinol Serum with Ceramides & Peptide and Saint Jane Beauty Star Flower Hydration Serum with Niacinamide and Hyaluronic Acid?