Is there anything I can use to dye a plastic hair extension?

I have plastic hair extensions (like barbie hair) and I need to know if there's any way I can dye it other than hair dye because everyone said that it won't work. Can anyone help me with this?Is there anything I can use to dye a plastic hair extension?
sorry u asked me a question bout biotin.. u can buy it at like a cvs store.. umm in the vitamin isle.. i use natures bounty i think its called.. good luck =]