IOPE Expert Vitamin C 25% Antioxidant Serum for Brightening vs Sunday Riley B3 Nice 10% Niacinamide Serum
IOPE Expert Vitamin C 25% Antioxidant Serum for Brightening scores 9.0/9.8 vs Sunday Riley B3 Nice 10% Niacinamide Serum at 8.5/9.8. IOPE Expert Vitamin C 25% Antioxidant Serum for Brightening wins for gentle formulation.
Head to head
Expert Vitamin C 25% Antioxidant Serum for Brightening
B3 Nice 10% Niacinamide Serum
Score comparison
IOPE Expert Vitamin C 25% Antioxidant Serum for Brightening edges ahead, winning 2 of 5 attributes.
Scores last verified: July 2026
Attribute battle
Hydration Efficacy
IOPE WINSIrritation Risk
Sunday Riley WINSActive Ingredient Strength
Sunday Riley WINSIngredient Transparency
TIEFormulation Safety
TIEIngredient face-off
5% overlapOnly in IOPE Expert Vitamin C 25% Antioxidant Serum for Brightening
24 unique
Only in Sunday Riley B3 Nice 10% Niacinamide Serum
41 unique
Why IOPE Expert Vitamin C 25% Antioxidant Serum for Brightening comes out ahead
Where IOPE Expert Vitamin C 25% Antioxidant Serum for Brightening really shines is irritation risk, scoring 7.7 compared to Sunday Riley B3 Nice 10% Niacinamide Serum's 9.5. IOPE Expert Vitamin C 25% Antioxidant Serum for Brightening keeps its formula cleaner, with fewer known irritants in the mix.
Hydration Efficacy is another area of separation. IOPE Expert Vitamin C 25% Antioxidant Serum for Brightening scores 6.8 here versus 5.1 for Sunday Riley B3 Nice 10% Niacinamide Serum. That difference comes down to how each formula is built — the ingredient list tells the story.
IOPE Expert Vitamin C 25% Antioxidant Serum for Brightening brings Ascorbic Acid, Gluconolactone, and Glutathione as actives, while sunday Riley B3 Nice 10% Niacinamide Serum relies on Niacinamide, Resveratrol, and Asiaticoside. Both approaches have merit, but the positioning and supporting ingredients make the difference.
Best for your skin type
IOPE Expert Vitamin C 25% Antioxidant Serum for Brightening is better if you have
- Sensitive skin — the low-irritation formula keeps things gentle
- Targeting specific concerns like aging or uneven tone — Ascorbic Acid does the heavy lifting
- Anyone who prefers clean, well-vetted formulations
Sunday Riley B3 Nice 10% Niacinamide Serum 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
Value comparison
Both sit in the premium bracket, so value comes down to formulation quality. IOPE Expert Vitamin C 25% Antioxidant Serum for Brightening gets the nod here with its 9.0 overall score — you're getting more for a similar outlay.
Our verdict
IOPE Expert Vitamin C 25% Antioxidant Serum for Brightening edges ahead with a slightly stronger formulation, but Sunday Riley B3 Nice 10% Niacinamide Serum is still a solid pick.
Frequently asked questions
Which is better: IOPE Expert Vitamin C 25% Antioxidant Serum for Brightening or Sunday Riley B3 Nice 10% Niacinamide Serum?
Based on ingredient analysis, IOPE Expert Vitamin C 25% Antioxidant Serum for Brightening scores higher overall. See the full score breakdown above for details on each attribute.
Do IOPE Expert Vitamin C 25% Antioxidant Serum for Brightening and Sunday Riley B3 Nice 10% Niacinamide 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 IOPE Expert Vitamin C 25% Antioxidant Serum for Brightening and Sunday Riley B3 Nice 10% Niacinamide Serum?
The key differences are in their active ingredients and formulation approach. Check the attribute battle above for a detailed breakdown.