INNBEAUTY PROJECT Pro C Serum Brightening Solution with 15% Vitamin C + Ferulic Acid vs Kiehl's Since 1851 Better Screen™ UV Serum SPF 50+ Facial Sunscreen with Collagen Peptide
INNBEAUTY PROJECT Pro C Serum Brightening Solution with 15% Vitamin C + Ferulic Acid scores 9.7/9.8 vs Kiehl's Since 1851 Better Screen™ UV Serum SPF 50+ Facial Sunscreen with Collagen Peptide at 6.1/9.8. INNBEAUTY PROJECT Pro C Serum Brightening Solution with 15% Vitamin C + Ferulic Acid wins for active ingredients.
Head to head
Pro C Serum Brightening Solution with 15% Vitamin C + Ferulic Acid
Better Screen™ UV Serum SPF 50+ Facial Sunscreen with Collagen Peptide
Score comparison
INNBEAUTY PROJECT Pro C Serum Brightening Solution with 15% Vitamin C + Ferulic Acid takes this one, winning 1 of 5 attributes.
Scores last verified: July 2026
Attribute battle
Hydration Efficacy
TIEIrritation Risk
TIEActive Ingredient Strength
INNBEAUTY PROJECT WINSIngredient Transparency
TIEFormulation Safety
TIEIngredient face-off
12% overlapOnly in INNBEAUTY PROJECT Pro C Serum Brightening Solution with 15% Vitamin C + Ferulic Acid
37 unique
Shared ingredients
5 in common
Only in Kiehl's Since 1851 Better Screen™ UV Serum SPF 50+ Facial Sunscreen with Collagen Peptide
21 unique
Why INNBEAUTY PROJECT Pro C Serum Brightening Solution with 15% Vitamin C + Ferulic Acid comes out ahead
Where INNBEAUTY PROJECT Pro C Serum Brightening Solution with 15% Vitamin C + Ferulic Acid really shines is active ingredient strength, scoring 9.8 compared to Kiehl's Since 1851 Better Screen™ UV Serum SPF 50+ Facial Sunscreen with Collagen Peptide's 2.6. Its formula features Tetrahexyldecyl Ascorbate, Niacinamide, and Ascorbic Acid in high positions, signalling meaningful concentrations.
INNBEAUTY PROJECT Pro C Serum Brightening Solution with 15% Vitamin C + Ferulic Acid brings Tetrahexyldecyl Ascorbate, Niacinamide, and Ascorbic Acid as actives, while kiehl's Since 1851 Better Screen™ UV Serum SPF 50+ Facial Sunscreen with Collagen Peptide relies on Tocopherol, Palmitoyl Tripeptide-1, and Palmitoyl Tetrapeptide-7. Both approaches have merit, but the positioning and supporting ingredients make the difference.
Best for your skin type
INNBEAUTY PROJECT Pro C Serum Brightening Solution with 15% Vitamin C + Ferulic Acid is better if you have
- Sensitive skin — the low-irritation formula keeps things gentle
- Targeting specific concerns like aging or uneven tone — Tetrahexyldecyl Ascorbate does the heavy lifting
- Anyone who prefers clean, well-vetted formulations
Kiehl's Since 1851 Better Screen™ UV Serum SPF 50+ Facial Sunscreen with Collagen Peptide is better if you have
- Sensitive skin — the low-irritation formula keeps things gentle
- Anyone who prefers clean, well-vetted formulations
Value comparison
INNBEAUTY PROJECT Pro C Serum Brightening Solution with 15% Vitamin C + Ferulic Acid comes in at premium pricing with a 9.7 score, which is solid value at that tier.
Our verdict
INNBEAUTY PROJECT Pro C Serum Brightening Solution with 15% Vitamin C + Ferulic Acid wins this comparison with a meaningfully stronger ingredient profile and overall score.
Frequently asked questions
Which is better: INNBEAUTY PROJECT Pro C Serum Brightening Solution with 15% Vitamin C + Ferulic Acid or Kiehl's Since 1851 Better Screen™ UV Serum SPF 50+ Facial Sunscreen with Collagen Peptide?
Based on ingredient analysis, INNBEAUTY PROJECT Pro C Serum Brightening Solution with 15% Vitamin C + Ferulic Acid scores higher overall. See the full score breakdown above for details on each attribute.
Do INNBEAUTY PROJECT Pro C Serum Brightening Solution with 15% Vitamin C + Ferulic Acid and Kiehl's Since 1851 Better Screen™ UV Serum SPF 50+ Facial Sunscreen with Collagen Peptide share ingredients?
Yes, they share common ingredients. Check the ingredient face-off section above for a detailed comparison.
What's the main difference between INNBEAUTY PROJECT Pro C Serum Brightening Solution with 15% Vitamin C + Ferulic Acid and Kiehl's Since 1851 Better Screen™ UV Serum SPF 50+ Facial Sunscreen with Collagen Peptide?
The key differences are in their active ingredients and formulation approach. Check the attribute battle above for a detailed breakdown.