... effect could keep one month 5.MOQ:500pcs 100% Natural Black Hair Dye---Allergy FreeIngredientPolygonum multiflorum extract, Vitamin B5 ... , VE, food additive, EDTA2Na, amid acid, Chinese medicine natural pigment, water.Feature1. No Phenylenediamine, which could cause cancer ... could last about 1 month, colored solid, natural color, bright and green natural hair product.3.A little troublesome to operate, ...