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Title: dangerous
Review: I used the black variety, a few days after I used it I noticed a strange blue-black colour in my nasal mucous . The strange colour disappeared after a week of discontinued use. The active ingredient is probably carcinogen. I reported the adverse reaction on the FDA form. I don't expect any action from the Agency as this agency is grossly inefficient and is paid off under the table. Good luck, you're on your own in this beautiful country of the U.S. of A.Toppik Hair Building Fiber Dark Brown
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