Permanent black nails using black hair dye o_o

Henna is a healthier option for hair colouring, it dosen't contain harsh chemicals like other hair dyes. this does not damage my nails. henna heals the conditiion of the nails but im not sure if this one does because after all its a black hair dye, it must have some chemicals to change the henna BLACK to begin with. this is a muslim friendly idea. it wont effect prayers or wudhuk evangellyn.blogspot.com