iron is not good for us and the liver and it makes absolutely no sense to take it without checking if levels are deficient
iron and cancer
http://www.ncbi.nlm.nih.gov/pubmed/12957299
check your iron levels and if deficient try to change diet first and use supplements if very low
it is more important to check that vitd25oh is 40-60ng/ml and that you eat organic foods first and then iron