Hair Growth: How fast does hair grow?

 facts and figures

 How fast hair can grow is not really a flat answer. That depends on the hair type, the sex, the age and other influencing factors.  Here you will learn all you need to know about hair growth and get more hairy facts.

Getting Started Average growth How many hairs do we have? How thick are hair? What does hair consist of? How many hairs fall

Average growth

 The average hair growth per day is about 0.3 to 0.5 mm, about 1 to 1.5 cm per month and 12 to 15 cm a year.  However, this growth is dependent on age, hormone status and ethnicity.  Asian hair, for example, grows faster than African hair.

 The hair growth cycle is faster in summer than in winter and slower during the night than during the day.  Men usually have denser hair and faster hair growth than women.  For more information on the different phases of hair growth - growth phase, transition phase and resting phase - see hair cycle.

How many hair do we have?

On average, humans have 100,000 hairs on their heads: blond people usually have a little more, up to 150,000 (but mostly thinner hair), dark-haired people around 100,000 and redheads about 80,000 hairs.  The number of hair is genetically determined by each human

 How thick are hair?

 Central European hair has an average thickness of 0.06 mm.  Asian hair is about 0.06 - 0.08 mm thick and African hair is the finest at 0.04 to 0.5 mm

What does hair consist of?

 A hair consists of two parts, the hair shaft and the hair root.  The hair root sits in the dermis and is surrounded by a small shell, the hair follicle, which is also called hair follicle.  Incidentally, the shape of these follicles determines whether our hair is smooth or curly: the rounder the follicle, the smoother the hair grows.  For curls he has an oval shape.

How many hair fall out?

 The hair shaft contains the pigment that determines our innate hair color.  The hair itself consists of horn filaments - a mixture of keratin, melanin, sulfur, water and fat.  If the hair contains too little keratin or is too dry, they often become dull and brittle.

After two to six years usually falls out a hair, it drops 50 to 100 hair daily.  If we have more than 100 head hair, we speak of hair loss.

 Here, the hereditary hair loss (androgenetic alopecia), the hormonal-conditioned condition, and the diffuse hair loss, which depends on the living conditions of those affected, represent the most common hair loss.

 Incidentally, the thickness of the hair as well as the Haarlängehaben no significance for the development of hair loss.  It arises in the hair follicles of the hair roots in the scalp.