c pure bright serum

Several products are labeled for "All Skin Types." Others specify suitability for normal, dry, oily, combination, sensitive, acne-prone, and mature skin—several formulas explicitly call out being suitable for sensitive or acne-prone skin.

The collection includes direct L-ascorbic acid (pure vitamin C), stabilized derivatives (such as ascorbyl glucoside and ethyl ascorbyl ether), dual water- and oil-soluble blends, and encapsulated delivery systems like liposomes or microcapsules.

Typical directions are to apply a few drops to face and neck after cleansing, often once or twice daily. Some labels specify 2–4 drops, advise avoiding the eye area, and recommend following daytime use with moisturizer and sunscreen.

Sensitive-skin approaches in this set include mid-level vitamin C concentrations (for example, around 12%), stabilized derivatives or encapsulated/liposome delivery systems, and formulas labeled as low-irritant or "suitable for sensitive skin."