Gray hair is hair that changes color to white. Not usually occur simultaneously. Hair becomes gray when melanocytes cells in hair follicles stop producing melanin (color pigment). Hair melanin is composed of two types of dark brown eumelanin or pheomelanin black and yellow or red. Concentration and combination of both in different proportions creates a wide spectrum of human hair colors, from jet black to light blonde. Hair that has lost most of the melanin will be colored gray, hair that has lost all of it is white pigment. The process is usually a gradual loss of melanin, the longer the more hair to gray and white.
The following is a cause of gray hair.
- Age factor
However, faster does not mean gray hair faster aging. A study of about 1,200 people in Rancho Bernardo, California, showed that the growth of gray hair are not associated with bone density in old age.
- Heredity factors
In one experiment, mice were injected with artificial adrenaline (isoproterenol) to trigger the stress has decreased the amount of protein that protects cells from damage, from the nature of cosmetics such as hair graying to life-threatening as cancer. P53 protein is, who was dubbed the "guard the genome" because it prevents DNA mutation and tumor formation. Prolonged stress acting together with the injection of adrenaline in reducing the level of p53.
- Repeal gray hair
There are some plants that can be used to prevent gray hair, among others:
- 1/2 pieces old fruit of Coconut - Cocos nucifera, Linn's then, shredded or crushed, then mixed with the water present in the fruit of Coconut - Cocos nucifera, Linn, and filtered. Mix a little salt, and use water to wash it regularly.
- 100 grams leaf of Rambutan - Nephelium lappaceum L, refined and filtered to take water. Use water to wash hair. Do it every day.