Fresh Pressed 7-Day System with Pure Vitamin C

Both rely on ascorbic acid as the sole active, but Obagi's ultra-minimal formula skips all the peptides, antioxidants, and plant extracts that define Clinique's blend.

Both use plain ascorbic acid as the vitamin C form, but Vichy is a simple hydration/antioxidant serum lacking Clinique's peptide complex, barley/mulberry brighteners, and caffeine.

Shares ascorbic acid as the core active but is a minimalist high-strength booster with ferulic acid/vitamin E, missing Clinique's peptides, plant extracts, and soothing agents entirely.

Shares ascorbic acid but SkinCeuticals leans on ferulic acid and vitamin E as its antioxidant duo, with none of Clinique's peptides or botanical extracts.

Both contain ascorbic acid, but Revision pairs it with gallic acid and ubiquinone instead of Clinique's peptide and plant-extract complex, making the supporting actives quite different.