From skin smoothing and brightening to sun protection, vitamin C serums can work wonders during the summer. Save big on this ...

Public interest in vitamin C has surged in 2025 as consumers search for cleaner, more effective options beyond standard pills. Across TikTok, Reddit, and wellness forums, questions are rising about ...

“Vitamin C serum is best applied in the morning after cleansing and before moisturizing and sunscreen,” Dr. Garshick explains ...

The Skin Renewing Vitamin C has an instant brightening effect, thanks to the inclusion of the most potent form of the named ingredient L ascorbic acid in a heavy-hitting 10 per cent concentration.

Why Vitamin C Deserves a Place in Your Routine Vitamin C is celebrated in skincare for being able to do many important tasks ...

In this viscous formula, the vitamin C derivative ascorbic acid (a twin to L-ascorbic) is at a 12% concentration, and it’s second only to water on the ingredients list.

Other forms of vitamin C—such as ethyl ascorbic acid, found in the Olay Vitamin C + Peptide 24 Brightening Serum featured in our guide—are more stable and may require less-meticulous care than ...

On the note of stability - some forms of vitamin C are more stable and beneficial than others. For example, you might see vitamin C referred to as 'ascorbic acid' in skincare.

According to a doctor, the best vitamin C serums for rosacea contain low concentrations of L-ascorbic acid or THD, and don’t contain potential irritants like alcohol or fragrance.

According to experts, the best vitamin C serums for sensitive skin are formulated with medium-strength concentrations of ascorbic acid, tetrahexyldecyl ascorbate, and sodium ascorbyl phosphate.