Here are some common ingredients in skin care products and what they mean.

Salicylic acid: This exfoliates the outer layer of skin and unclogs pores.

Alpha-hydroxy acids (such as glycolic and lactic acids): These compounds remove dead skin cells, moisturize the skin and minimize acne scars, discoloration and fine lines.

Retinoids: These are forms of vitamin A that boost collagen production and reduce fine lines and wrinkles. They can be obtained in prescription or nonprescription strength.

Vitamin C: Available in various formulations, vitamin C helps heal blemishes, even out skin tone and give the skin a healthy glow.