111SKIN Black Diamond Vitamin C Brightening Booster

For best results, use it daily, both in the morning and evening, after cleansing and toning.

While the booster is formulated to be gentle, it's always recommended to perform a patch test before regular use. If you experience irritation, reduce frequency.

It is always best to consult with your doctor before using new skincare products during pregnancy or while breastfeeding.

Most users see improvements in skin brightness and evenness within 2-4 weeks with consistent use.

Yes, but introduce them gradually and avoid using multiple high-concentration active serums at the same time to avoid potential irritation.

If the product changes color significantly, it may have oxidized and should be discarded. Replace it with a fresh bottle.

The booster provides antioxidant protection, but it's essential to use a broad-spectrum sunscreen daily for optimal sun protection.

Store it in a cool, dry place away from direct sunlight, with the bottle tightly sealed.

Reduce the frequency of use to every other day or apply a smaller amount. If irritation persists, discontinue use and consult a dermatologist.

If the product has significantly changed color (e.g., turned dark yellow or brown), it may have oxidized. Discontinue use and replace with a fresh bottle.

Ensure consistent use and proper application. Consider adding gentle exfoliation to your routine to enhance absorption. Results vary, so be patient.