The Inkey List Niacinamide Serum vs TruSkin Vitamin C Super Serum
Paying $6.01 more for TruSkin buys you ascorbic acid.
TruSkin Vitamin C Super Serum adds ascorbic acid (moderate evidence) that The Inkey List Niacinamide Serum doesn't have. On consumer consensus, The Inkey List Niacinamide Serum holds 4.3★ across 12,400 reviews vs TruSkin Vitamin C Super Serum's 4.5★ across 13,700 reviews. The extra $6.01 for TruSkin Vitamin C Super Serum is defensible for the added ascorbic acid.
Not medical advice — consult a dermatologist. Conditions are self-declared and never diagnosed by this app.