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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.
According to Dr. Rabach, free radicals (aka the unstable molecules that damage your cells and cause graying) can be triggered by a number of non-genetic environmental and lifestyle factors such as ...
Harsh chemical treatments like bleaching or chemical straightening and relaxing, can weaken hair, damage hair shafts, and lead to breakage over time. ... Same goes for hair dye. Opt for gentle ...
Pyrogallol use, e.g. in hair dye formulations, is declining because of concerns about its toxicity. [10] Its LD 50 (oral, rat) is 300 mg/kg. [3] Pure pyrogallol was found to be extremely genotoxic when inserted into cultured cells, but α amylase proteins protect against its toxicity during everyday exposure. [11] [12]
Hair bleaching products can damage hair and cause severe burns to the scalp when applied incorrectly or left on too long. [ 17 ] Industrial bleaches that work by reduction (such as sodium hydrosulphite ) react with a chromophore, the part of the molecule responsible for its color and decrease the number of carbon-oxygen bonds in it, making it ...
Ayurvedic Natural Hair Color. For a 100% natural option, check out Khadi's natural hair dye. The ingredient list is comprised entirely of vegan herbal ingredients.
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