Where IOPE Expert Vitamin C 25% Antioxidant Serum for Brightening really shines is active ingredient strength, scoring 7.0 compared to OLIVIAUMMA Jelly Brightening Serum with Vitamin C and Niacinamide's 4.9. Its formula features Ascorbic Acid, Gluconolactone, and Glutathione in high positions, signalling meaningful concentrations.
Irritation Risk is another area of separation. OLIVIAUMMA Jelly Brightening Serum with Vitamin C and Niacinamide scores 9.5 here versus 7.7 for IOPE Expert Vitamin C 25% Antioxidant Serum for Brightening. 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 oLIVIAUMMA Jelly Brightening Serum with Vitamin C and Niacinamide relies on Niacinamide, Arginine, and Allantoin. Both approaches have merit, but the positioning and supporting ingredients make the difference.
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.