Eleven SNPs had alleles that were clearly associated with low iron, iron deficiency anaemia and/or IRIDA (SNPs in TMPRSS6 (rs855791, rs2235321, rs2235324, rs4820268, rs2413450, rs228916, rs228918 and rs228921) and TF (rs3811647, rs1799899 and rs8177253) (S1 Table). This evidence concerns the gene TMPRSS6 and Iron deficiency anemia.