Androgenic Alopecia or male or female pattern baldness:
Male Pattern Baldness:
More than 95% of hair thinning in men is defined as male pattern baldness, or androgenetic alopecia. Male pattern baldness is characterized by hair receding from the lateral sides of the forehead (known as a “receding hairline”) and/or a thinning crown (balding to the area known as the ‘vertex’. Both become more pronounced until they eventually meet, leaving a horseshoe-shaped ring of hair around the back of the head. The trigger for this type of baldness is DHT, a powerful sex hormone, body- and facial-hair growth promoter that can adversely affect the prostate as well as the hair located on the head. The mechanism by which DHT accomplishes this is not yet fully understood. In genetically-prone scalps, i.e. those experiencing male or female pattern baldness, DHT initiates a process of follicular miniaturization, in which the hair follicle begins to deteriorate. As a consequence, the hair’s growth phase (anagen) is shortened, and young, unpigmented vellus hair is prevented from growing and maturing into the deeply-rooted and pigmented terminal hair that makes up 90 per cent of the hair on our heads. In time, hair becomes thinner and its overall volume is reduced, resembling fragile vellus hair or “peach fuzz” until, finally, the follicle falls dormant and ceases producing hair completely.
Female Pattern Baldness: