Cosmetics are substances used to enhance or protect the appearance or odor of the human body. Cosmetics include skin-care creams, lotions, powders, perfumes, lipsticks, fingernail and toenail polishes, eye and facial makeup, permanent waves, hair colors, hair sprays and gels, deodorants, baby products, bath oils, bubble baths, bath salts, butters and many other types of products. Their use is widespread, especially among women in Western countries. A subset of cosmetics is called "make-up," which refers primarily to colored products intended to alter the user’s appearance. cosmetics as: "intended to be applied to the human body for cleansing, beautifying, promoting attractiveness, or altering the appearance without affecting the body's structure or functions." This broad definition includes, as well, any material intended for use as a component of a cosmetic product. The FDA specifically excludes soap from this particular category.

In addition to over-the-counter cosmetic products, recent years have seen an increasing market for prescription or surgical cosmetic procedures. These range from temporary enhancements, such as cosmetic colored contact lenses, to major cosmetic surgery.

Many techniques, such as microdermabrasion and chemical or physical peels, remove the oldest, top layers of skin cells. The younger layers of skin left behind appear more plump, youthful, and soft. Permanent application of pigments (tattooing) is also used cosmetically

The various forms of makeup include:

Lipstick, lip gloss, lip liner, lip plumper, lip balm, lip luster, lip conditioner and lip boosters.
Foundation, used to color the face and conceal flaws to produce an impression of health and youth. Usually a liquid, cream, powder or mousse.
Powder, or face illuminator used to set the foundation, giving a matte finish.
Rouge, blush or blusher, cheek stain used to color the cheeks and emphasize the cheekbones. This comes in powder, cream and gel forms.
Bronzer, used to create a more tanned or sun-kissed look.
Mascara and lash extender, lash conditioner used to enhance the eyelashes. Can be of different colors and even waterproof.
Eye liner and eye shadow, eye shimmer and glitter eye pencils as well as different color pencils used to color and emphasize the eyelids (larger eyes are a sign of youth).
Eyebrow pencils, creams, waxes, gels and powders are used to fill in and define the brows.
Nail polish, used to color the fingernails and toenails.
Concealer, a type of thick opaque makeup used to cover pimples, various spots and inconsistencies in the skin.
Also included in the general category of cosmetics are skin care products. These include creams and lotions to moisturize the face and body, sunscreens to protect the skin from damaging UV radiation, and treatment products to repair or hide skin imperfections (acne, wrinkles, dark circles under eyes, etc.). Cosmetics can also be described by the form of the product, as well as the area for application. Cosmetics can be liquid or cream emulsions; powders, both pressed and loose; dispersions; and anhydrous creams or sticks.