A measurement of how much electricity is being used in 1 second is a(n):

Eumelanin provides natural colors ranging from red and ginger to yellow and blond tones.

The medulla, the innermost layer of the hair, is composed of cells that are:

Ultraviolet A light has the longest wavelength of the UV light spectrum.

UV prompts the skin to produce vitamin D, a fat-soluble vitamin that promotes mineralization of bones.

The path of an electric current from the generating source back to the original source is a(n):

A wall plate is also known as facial stimulator.

Cold cream is an example of an oil-in-water emulsion of two immiscible liquids.

Rubber, silk, wood, and glass are common examples of:

The process of chemically altering the natural wave pattern of hair is: