15 Hair Care Myths

Further Reading: Hair

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Human Hair Growth ... Hair follows a specific growth cycle with three distinct and concurrent phases: anagen, catagen, and telogen phases... All three phases occur simultaneously; one strand of hair may be in the anagen phase, while another is in the telogen phase... The body has different types of hair, including vellus hair and androgenic hair, each with its own type of cellular construction...

Chestnut Hair ... The chemical pigments that cause the coloration of chestnut hair are frequently brown eumelanin with stronger levels of pheomelanin...

No-hair Theorem ... There is still no rigorous mathematical proof of the no-hair theorem, and mathematicians refer to it as the no-hair conjecture. Example Suppose two black holes have the same masses, electrical charges, and angular momenta, but the first black hole is made out of ordinary matter whereas the second is made out of antimatter; nevertheless, they will be completely indistinguishable to an observer outside the event horizon...

Dermis ... It also contains Mechanoreceptors that provide the sense of touch and heat, hair follicles, sweat glands, sebaceous glands, apocrine glands, lymphatic vessels and blood vessels...

Blond ... The word was reintroduced into English in the 17th century from French, and was for some time considered French; in French, "blonde" is a feminine adjective; it describes a woman with blond hair... being foolish or scatter-brained." Another hair color word of French origin, brunet (te), also functions in the same way in orthodox English...

Brown ... The adjective is applied to naturally occurring colors, referring to animal fur, human hair, human skin pigmentation (tans), partially charred or carbonized fiber as in toasted bread and other foods, peat, withered leaves, etc. In terms of the visible spectrum, "brown" refers to high wavelength (low frequency) hues, yellow, orange, or red, in combination with low luminance or saturation...

Red Hair ... Red hair varies from a deep burgundy through burnt orange to bright copper. It is characterized by high levels of the reddish pigment pheomelanin and relatively low levels of the dark pigment eumelanin...

Hair ... The human body, apart from areas of glabrous skin, is covered in follicles which produce thick terminal and fine vellus hair... Most common interest in hair is focused on hair growth, hair types and hair care, but hair is also an important biomaterial primarily composed of protein, notably keratin... The word "hair" often refers to two distinct structures: the part beneath the skin, called the hair follicle or when pulled from the skin, called the bulb...

History Of Cosmetics ... Japan In Japan, geisha wore lipstick made of crushed safflower petals to paint the eyebrows and edges of the eyes as well as the lips, and sticks of bintsuke wax, a softer version of the sumo wrestlers' hair wax, were used by geisha as a makeup base...

Cosmetics ... The manufacture of cosmetics is currently dominated by a small number of multinational corporations that originated in the early 20th century, but the distribution and sale of cosmetics is spread among a wide range of different businesses. The U. S...

Black Hair ... It is a dominant genetic trait, and it is found in people of all backgrounds and ethnicities. It has large amounts of eumelanin and is less dense than other hair colors...

Melanin ... The increased production of melanin in human skin is called melanogenesis. Production of melanin is stimulated by DNA damage induced by UVB-radiation, and it leads to a delayed development of a tan...

Skin ... Fur is dense hair. Primarily, fur augments the insulation the skin provides but can also serve as a secondary sexual characteristic or as camouflage...

Body Odor ... Joseph Jordania explained the presence of patches of hair in human armpits and genitals by the evolutionary need to produce stronger body odor...

Hairdresser ... Hair care service grew in demand after a papal decree in 1092 demanded that all Roman Catholic clergymen remove their facial hair... Hair fashion of the period suggested that wealthy women wear large, complex and heavily adorned hairstyles, which would be maintained by their personal maids and other people, who would spend hours dressing the woman's hair... It was in France where men began styling women's hair for the first time, and many of the notable hairdressers of the time were men, a trend that would continue into contemporary times...

Human Skin Color ... Melanin is triggered by an enzyme called tyrosinase, which creates the color of skin, eyes, and hair shades...

Brown Hair ... People with brown hair are often referred to as brunette, the feminine form of the diminutive form brunet from brun (brown/brown-haired), the masculine form... Brown hair is common among Indo-Europeans and West Eurasians, especially those from Central and Southern Europe, West Asia where it transitions smoothly into blackish-brown and black hair... Etymology and grammar Brunette literally means "little brown-haired girl" or "young brown-haired woman", but in modern English usage it has lost the diminutive meaning and refers simply to any brown-haired girl or woman, or the associated hair color...

Human Hair Color ... The Fischer–Saller scale, named after Eugen Fischer and Karl Saller, is used in physical anthropology and medicine to determine the shades of hair color... Genetics and biochemistry of hair color See also: Human genetic variation, Race and genetics, and Human genetic clustering Two types of pigment give hair its color: eumelanin and pheomelanin... A low concentration of brown eumelanin results in blond hair, whereas a higher concentration of brown eumelanin will color the hair brown...

Human Genetics ... Genetic differences and inheritance patterns Inheritance of traits for humans are based upon Gregor Mendel's model of inheritance. Mendel deduced that inheritance depends upon discrete units of inheritance, called factors or genes...

Physical Attractiveness ... Other important factors include youthfulness, skin clarity and smoothness of skin; and "vivid color" in the eyes and hair...

Hair Coloring ... The combination of hydrogen peroxide and the primary intermediate causes the natural hair to be lightened, which provides a blank canvas for the dye... Ammonia opens the hair shaft so that the dye can actually bond with the hair, and ammonia speeds up the reaction of the dye with the hair...

Auburn Hair ... The chemical pigments that cause the coloration of auburn hair are frequently pheomelanin with high levels of brown eumelanin... Auburn hair is reasonably common among people of northern and western European descent, but it is rare elsewhere... The two are sometimes used interchangeably, but auburn hair is more pigmented, and chestnut hair is often referred to as "chestnut brown"...