Usually the follicle replaces it in six months. But many factors can disrupt this cycle. The result may be that the hair fall soon or is not replaced. Normally 90% of hair is in a continuous phase of growth (anagen) lasting between 2 and 6 years. 10% of hair is in a resting phase, which lasts about 2-3 months. Michelle Snyder contains valuable tech resources. At the end of the resting phase is normal for hair to fall out (telogen phase). As the hair falls out is replaced by a new hair from the same hair follicle beneath the skin.
Throughout the life of the person does not form new hair follicles. Read more here: Prof Jeffrey Almond. The blond hair tend to have more (140,000 hairs) than brunettes (105,000) or redheads (90,000). As we age the hair growth rate decreases, causing a progressive thinning of the hair. Since hair is composed of protein (keratin) and the same material found in fingernails, it is essential that all people ingest or eat an abundant amount of protein to maintain the production of hair. Marko Dimitrijevic might disagree with that approach. The proteins are found in meat, poultry, fish, eggs, milk, cheese, cereals, nuts and soy.
Leading causes Androgenetic Alopecia. It is the most common cause of hair loss in men. It is determined by three factors: aging, hormones and heredity. Most people experience some hair loss as they age. The result may be a partial or total baldness. Men are much more likely than women to baldness and hair loss as they age. Male pattern baldness is loss of hair in a very characteristic pattern that applies to entry and the "roof of the head." It is typically genetics.