What Is Vitamin C Serum?
Vitamin C serum is a topical product used for antioxidant protection, increased radiance, and dark spot reduction on the skin. It contains L-ascorbic acid or its derivatives (magnesium ascorbyl phosphate, ethyl ascorbic acid). How to use vitamin C serum and which concentration to choose are summarized in this guide. You may also refer to our skincare routine and retinol articles.
Benefits of Vitamin C Serum
It reduces UV damage, supports collagen synthesis, inhibits melanin production to lighten dark spots, and evens out skin tone. Using it in the morning routine alongside sunscreen is considered ideal.
How to Use Vitamin C Serum
Apply in the morning after cleansing and toner, before moisturizer and sunscreen. 3–5 drops are sufficient; apply SPF before it dries. 10–20% L-ascorbic acid is suitable for beginners; for sensitive skin, a lower concentration or derivative is preferred. Do not apply retinol at the same time; use retinol at night and vitamin C in the morning.
Vitamin C Serum and Dark Spots
In dark spot treatment, vitamin C serum can be used alone or as a complement to laser, peeling, and spot mesotherapy treatments. Sunscreen use is mandatory; otherwise, spots may recur. Please see our dark spots and laser spot treatment guides for more information.
Conclusion
With regular use, vitamin C serum provides visible improvement in skin radiance and dark spot appearance. Our sunscreen guide covers SPF and UVA protection in detail.
Apply in the morning before moisturizer and sunscreen; use retinol at night. 10–20% L-ascorbic acid is suitable for beginners; for sensitive skin, a derivative or lower concentration is preferred. Sunscreen use is mandatory in dark spot treatment; otherwise, spots may recur.
This article is for informational purposes only. Please consult a qualified physician for any treatment decisions.