Dr. I'm 22 Yr Old And I Eat Slate Pencils

Dr. I'm 22 yr old and I eat slate pencils some thng like 4 pieces per day ...is there any connection for hair growth due to dis ..I hv been eating since 6 years ..I'm unable to stop myself frm these ...my hair is thinning day by day I try using so many thngs but no solution I tried Ayurvedic products no use .,still my hair is thinning ..is eating slate pencil leav to such severe effects plz explain I'm worried