03-26-2012, 02:03 PM
Join Date: Aug 2011
If the "henna" powder is contaminated with lead, some of the powder can accidentally be inhaled. When lead is inhaled, it enters the lungs, and then it can enter the bloodstream.
According to the sources I found, lead really can't be absorbed through skin, but chronic exposure increases the chances of some absorbtion. Lead can enter into the body through open wounds, like cuts or abrasions on the scalp. Other bacteria/pathogens definitely can enter the body through the skin, especially through wounds, and cause sepsis.
"Henna" (the stuff that's not really pure henna) that contains PPD is known to cause severe allergic reactions, particularly if used on skin. According to this book, pure Henna is not the cause of these documented problems: Clinical nephrotoxins: renal injury from drugs and chemicals - Marc E. De Broe, William M. Bennett, George A. Porter - Google Books
So the possible toxins could be PPD, Lead, both, and possibly other things. In any case, it's henna with additives that cause the problem, not pure, lab-tested, body art henna powder.
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