Loading...
IOPE Expert Vitamin C 25% Antioxidant Serum for Brightening scores 9.0/9.8 vs Jack Black Protein Booster Skin Serum at 8.5/9.8. IOPE Expert Vitamin C 25% Antioxidant Serum for Brightening wins for gentle formulation.
IOPE Expert Vitamin C 25% Antioxidant Serum for Brightening edges ahead, winning 2 of 5 attributes.
Scores last verified: June 2026
24 unique
27 unique
Where IOPE Expert Vitamin C 25% Antioxidant Serum for Brightening really shines is irritation risk, scoring 7.7 compared to Jack Black Protein Booster Skin Serum's 9.5. Jack Black Protein Booster Skin Serum includes fragrance ingredients like Citronellol and Geraniol, which can be a concern for reactive skin.
Active Ingredient Strength is another area of separation. IOPE Expert Vitamin C 25% Antioxidant Serum for Brightening scores 7.0 here versus 5.3 for Jack Black Protein Booster Skin 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 jack Black Protein Booster Skin Serum relies on Camellia Sinensis Leaf Extract, Dipeptide Diaminobutyroyl Benzylamide Diacetate, and Retinyl Palmitate. Both approaches have merit, but the positioning and supporting ingredients make the difference.
IOPE Expert Vitamin C 25% Antioxidant Serum for Brightening is better if you have
Jack Black Protein Booster Skin Serum is better if you have
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.
IOPE Expert Vitamin C 25% Antioxidant Serum for Brightening edges ahead with a slightly stronger formulation, but Jack Black Protein Booster Skin Serum is still a solid pick.
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.
Yes, they share common ingredients. Check the ingredient face-off section above for a detailed comparison.
The key differences are in their active ingredients and formulation approach. Check the attribute battle above for a detailed breakdown.
Honest skincare intel. No jargon, no gatekeeping — just the ingredients decoded.
Some links on this site are affiliate links. We may earn a commission from purchases made through our links, at no extra cost to you. This helps us keep Gracie free and independent.
© 2026 Gracie. All rights reserved. Data sourced from Open Beauty Facts (ODbL) and EU CosIng.