 [ Symptoms ] are there any nutrients i should be sure to consume or any supplements you would recommend to help with thinning hair [ Disease ] if overdose is suspected contact your local poison control center or emergency room immediately us residents can call the us national poison hotline at 1 800 222 1222 canada residents can call a provincial poison control center symptoms of overdose may include stomachabdominal pain mentalmood changes seizures fastirregular heartbeat