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.
Hair follicles are small sacs lined with skin cells. Oil glands emit sebum into these sacs, which serves to protect and lubricate hair. Cells enter the sac and get packed together and pushed out resulting in hair. The hair shaft (the part of hair that you see) is made up of keratin, a form of dead protein. To strengthen hair follicles, you must adopt a healthy diet because hair is derived from your cells and its health is dependent on your health--healthy hair is strong hair.