Vitamin C serum should be used after cleansing and toning your skin and before moisturizing. It can be applied in the morning to protect your skin from environmental stressors like UV rays and pollution with antioxidant properties, and it is important to follow it up with a broad-spectrum sunscreen. Applying it in the evening is also beneficial as it supports skin repair, cell turnover, and reduces dark spots, helping rejuvenate the skin overnight. Ideally, vitamin C serum can be used twice a day, morning and night, provided your skin tolerates it well. Start with a few drops and avoid rubbing it in to maintain effectiveness.

In summary:

• Use after cleansing and toning.
• Apply before moisturizer.
• Use in AM with sunscreen for protection.
• Use in PM to aid skin repair.
• Can be used once or twice daily based on skin tolerance.

This routine offers protection during the day and maximizes repair and brightness benefits overnight.