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After one of their classmates came into school with a henna tattoo, my children, aged 8 and 12 are begging me to let them get one too. A family friend, however, told me that her daughter had an awful reaction to one and I am concerned that they may not be safe for children. What is your take on them, and what should I do?
– Tattoo-free Mom
R :
The temporary tattoos of henna originated in India and the Middle East and were often used in religious ceremonies, such as weddings. Henna itself is harmless, made from the ground leaves of the plantLawsonia inermis whose active ingredient is a naphthoquinone mixed with water or oil. When applied to the skin it does not penetrate into the dermis but stains the epidermis a reddish-brown. It doesn't cause any allergic reactions. The problem comes when the henna is adulterated with additives and in the case of "black" henna, this additive is para-phenylenediamine (PPD), which is known to cause a delayed Type 4 sensitivity reaction. These delayed reactions may occur from 1-3 weeks after the tattoo, as in the case of your friend's child. [+]
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