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Lead in the bones, teeth, hair, and nails is bound tightly and not available to other tissues, and is generally thought not to be harmful. [177] In adults, 94% of absorbed lead is deposited in the bones and teeth, but children only store 70% in this manner, a fact which may partially account for the more serious health effects on children. [ 23 ]
Cosmetics, first used in ancient Rome for ritual purposes, [ 1] were part of daily life. Some fashionable cosmetics, such as those imported from Germany, Gaul and China, were so expensive that the Lex Oppia tried to limit their use in 189 BCE. [ 2] These "designer brands" spawned cheap knock-offs that were sold to poorer women. [ 3]
A woman with dyed pink hair. Hair coloring, or hair dyeing, is the practice of changing the color of the hair on humans' heads.The main reasons for this are cosmetic: to cover gray or white hair, to alter hair to create a specific look, to change a color to suit preference or to restore the original hair color after it has been discolored by hairdressing processes or sun bleaching.
And now you can join the color correction club. Available in a wide range of colors, from cool brown to copper, this product instantly extends the life of color-treated hair. Adjust the shade of ...
A variety of human hair colors; from top left, clockwise: black, brown, blonde, white, red. Human hair color is the pigmentation of human hair follicles and shafts due to two types of melanin: eumelanin and pheomelanin. Generally, the more melanin present, the darker the hair. Its tone depends on the ratio of black or brown eumelanin to yellow ...
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Keratin ( / ˈkɛrətɪn / [ 1][ 2]) is one of a family of structural fibrous proteins also known as scleroproteins. Alpha-keratin (α-keratin) is a type of keratin found in vertebrates. It is the key structural material making up scales, hair, nails, feathers, horns, claws, hooves, and the outer layer of skin among vertebrates.
Artificial nails are an extension, not a replacement, of natural nails. There are two main approaches to creating artificial nails – tips and forms: A tip is a heavyweight nail-shaped plastic plate glued on the end of the natural nail, or, if it is a full-cover tip or "press-on", glued on top of the entire nailbed, and can have gel, dip or acrylic added on top