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 IOPE Expert Vitamin C 25% Antioxidant Serum for Brightening's 7.0. Its formula features Tetrahexyldecyl Ascorbate, Niacinamide, and Ascorbic Acid in high positions, signalling meaningful concentrations.
Irritation Risk is another area of separation. INNBEAUTY PROJECT Pro C Serum Brightening Solution with 15% Vitamin C + Ferulic Acid 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.
INNBEAUTY PROJECT Pro C Serum Brightening Solution with 15% Vitamin C + Ferulic Acid brings Tetrahexyldecyl Ascorbate, Niacinamide, and Ascorbic Acid as actives, while iOPE Expert Vitamin C 25% Antioxidant Serum for Brightening relies on Ascorbic Acid, Gluconolactone, and Glutathione. 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. INNBEAUTY PROJECT Pro C Serum Brightening Solution with 15% Vitamin C + Ferulic Acid gets the nod here with its 9.5 overall score — you're getting more for a similar outlay.
