Vitamin C and Sensitive Skin: Why Irritation Happens (and When It Doesn’t) Vitamin C products can be tolerated by some people with sensitive skin and irritate others. A reaction is not proof of misuse or oxidation, and tingling is not evidence that a serum is working. The specific vitamin C form, complete formula, use pattern … Continue reading Vitamin C and Sensitive Skin: Why Irritation Happens (and When It Doesn’t)