Vitamin C in Skincare

Ascorbic acid (vitamin C) is a water-soluble vitamin and antioxidant used in dermatology "to treat and repair sun-damaged skin." It plays a key role in collagen production and maintaining skin structure, while also "fading pigmentation, reducing inflammation," and boosting the effectiveness of sunscreen.

Vitamin C in the Body

Humans cannot produce vitamin C on their own, so we rely on dietary sources. As a water-soluble vitamin, overdosing is rare, but the daily upper limit is capped at 2000 mg. Excessive intake can cause diarrhea and gastrointestinal discomfort.

Vitamin C in Skincare Products

Effective products are those that contain "more than 8% ascorbic acid concentration." However, concentrations above 20% don't improve efficacy further and may cause irritation.

In its pure form, vitamin C can turn yellow and has a shorter shelf life. In combined (stabilized) forms, it maintains its potency longer and can penetrate the skin more easily — though it is slightly less active.

Skincare Benefits

• Stimulates collagen production
• Fades dark spots and hyperpigmentation
• Reduces inflammation
• Boosts skin radiance
• Enhances sun protection

How to Use It

Vitamin C is best applied in the morning, as it maximally complements your sunscreen. Always finish your morning routine with SPF 30 or higher.