Exfoliants are not a common type of skin care product, as they are typically used only once or twice a week.

The primary function of a cleanser is to remove dirt, oil, and makeup from the skin.

Salicylic acid is not a common ingredient in moisturizers, as it is typically used in acne treatments.

The primary function of a toner is to balance the skin's pH, which can help to improve the skin's overall health and appearance.

Mechanical exfoliants are not a common type of exfoliant, as they can be harsh on the skin.

The primary function of a sunscreen is to protect the skin from the sun's UV rays, which can cause sunburn, skin cancer, and premature aging.

Botox injections are not a common type of skin care treatment, as they are typically used to treat wrinkles and other signs of aging.

The primary function of a microdermabrasion treatment is to remove dead skin cells, which can help to improve the skin's overall health and appearance.

Retinol peels are not a common type of chemical peel, as they are typically used to treat acne and other skin conditions.

The primary function of a laser treatment is to remove unwanted hair, although it can also be used to treat other skin conditions such as wrinkles, acne scars, and sun damage.

Exfoliants are not typically recommended for sensitive skin, as they can be harsh and irritating.

The primary function of a cleanser for sensitive skin is to remove dirt and oil from the skin without causing irritation.

Retinol is not a common ingredient in moisturizers for sensitive skin, as it can be irritating.

The primary function of a toner for sensitive skin is to balance the skin's pH without causing irritation.

Physical exfoliants are not typically recommended for sensitive skin, as they can be harsh and irritating.