Lose weight: Creating a calorie deficit that results in weight loss is hard work. Most recommendations say that to lose weight, you must exercise for at least an hour a day, five times a week. The type of exercise matters, too.
Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia. hair shaft. the nongrowing portion of a hair that protrudes from the skin, that is, from the follicle. hair shaft. The keratinized portion of a hair that extends from a hair follicle beyond the surface of the epidermis.
Blackheads form when a clog or plug develops in the opening of hair follicles in your skin. Each follicle contains one hair and a sebaceous gland that produces oil, called sebum, which helps keep your skin soft. Dead skin cells and oils collect in the opening to the skin follicle, producing a bump called a comedone.