Phenylethyl resorcinol

1-TRIMETHYL-2-CYCLOHEXENYL-1-PENTEN-3-ONE

ASCORBYL TETRAISOPALMITATE

A vitamin C derivative. Studies show that is might be effective in reducing hyperpigmentation, but there are no studies confirming that it is effectively converted into the bioavailable form of Vitamin C in skin. It is not clear how this derivative compares in effectiveness to the topical application of bioavailable form of vitamin C (L-ascorbic acid)

ASCORBYL GLUCOSIDE

A vitamin C derivative that is more stable but less potent than pure form of vitamin C. Has a potential to boost collagen production, nutralise free radicals and reduce hyperpigmentation, but the required concentration is likely to be much higher than for the pure form of vitamin C, limiting the ingredient's effectiveness in products

ACETYL GLUCOSAMINE

An effective moisturizing ingredient that also has been shown to be effective in evening out the skin tone and reducing hyperpigmentation. It can help somewhat reduce wrinkles in skin

GLUCOSAMINE HCL

Might be able to stimulate production of skin's natural moisturizing compounds such as hyaluronic acid. Could be helpful for evening the skin tone.