Henna is a shrub of 2-6m height ,it's native of tropical reigions of Africa,Southern Asia and Australasia.It has been in use since Bronze Age. It is applied on wedding ceremonies and feslivals for good luck,joy and happiness.Henna has an affinity to bond with protien due to the presence of lawsone, a burgundy dye molecule.Henna when used in a traditional way is harmless but when boosted with chemicalsphenylenediamine, silver nitrate, pyrogallol and carmine it can cause severe alergic reactions causing lifelong health damages
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