Though it is different from the skin in many ways, hair, like the horny epidermis, is derived from cells.Nutrition is carried through capillary vessel to the hair bulb. A small mass of cells at the base of the hair follicles,
\ncalled the \u201cMatrix\u201d, produces hair.Hair grows and pushes up to the surface of the scalp. Hair grows about 0.2 to 0.4 mm per day and the sebaceous
\nThe formation of hair<\/p>\n
Hair is formed of a combination of protein called Keratin and Water.
\nKaratin is harder and stronger than the protein of the internal organs of the human body. Keratin yields several kinds of amino-acid by hydrolysis.The amino-acids composing Keratin are as follows;Glutamic acid, Threonine, Valine, Cystine, Methionine, Alanine, Isoleucine, Tryptophan, Phenylalanine, Arginine, Proline, Lysine, Serine, Glycine, Histidine, Aspartic acid, Tyrosine and Hydroxylysine.
\nThe character of Hair
\n\u30fbHair diameterMax: 0.2mm (Mustache)General:0.05-0.15mm (Hair on scalp)Min: 0.005mm (Downy hair)
\n\u30fbHair growing speed 0.2-0.4mm\/day (Eyebrow 0.18mm\/day) 6-12mm\/month, 7-14cm\/year
\n\u30fbWater content Average: 10-13% (Healthy hair) Max: 30% (Water absorption)
\n\u30fbMaximum hair growth in generalJapanese: 70-80cm, Americans and Europeans: 70cm, Native Americans: 90cm,
\nChinese: 90-100cm,Africans: 25-40cm
\n\u30fbTensile strength of healthy hairAbout 120-180g\/hair
\n\u30fbQuantity of hair on head (for Japanese)Approximately 100,000 hairs
\n\u30fbPhysiological (natural) hair loss50 to 100 hairs per day
\n\u30fbElasticity of normal hair Max: 1.4-1.5 times
\n\u30fbDeterioration Non deterioration up to about 120\u2103 (about 250 degrees Fahrenheit)Expands with heat at more than about 120\u2103, turns from black to brown and becomes weak.
\n\u30fbChemical Reaction Weaker against alkalis. Relatively stronger against acids.<\/p>","protected":false},"excerpt":{"rendered":"
Though it is different from the skin in many ways, hair, like the horny epidermis, is derived from cells.Nutrition is carried through capillary vessel to the hair bulb. A small mass of cells at the base of the hair follicles, called the \u201cMatrix\u201d, produces hair.Hair grows and pushes up to the surface of the scalp. […]<\/p>\n","protected":false},"author":1,"featured_media":303,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[1],"tags":[],"_links":{"self":[{"href":"https:\/\/www.kaminomoto.co\/en\/wp-json\/wp\/v2\/posts\/296"}],"collection":[{"href":"https:\/\/www.kaminomoto.co\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.kaminomoto.co\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.kaminomoto.co\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.kaminomoto.co\/en\/wp-json\/wp\/v2\/comments?post=296"}],"version-history":[{"count":1,"href":"https:\/\/www.kaminomoto.co\/en\/wp-json\/wp\/v2\/posts\/296\/revisions"}],"predecessor-version":[{"id":297,"href":"https:\/\/www.kaminomoto.co\/en\/wp-json\/wp\/v2\/posts\/296\/revisions\/297"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.kaminomoto.co\/en\/wp-json\/wp\/v2\/media\/303"}],"wp:attachment":[{"href":"https:\/\/www.kaminomoto.co\/en\/wp-json\/wp\/v2\/media?parent=296"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.kaminomoto.co\/en\/wp-json\/wp\/v2\/categories?post=296"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.kaminomoto.co\/en\/wp-json\/wp\/v2\/tags?post=296"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}