AAS type: TRT↑ Hb levels in older men with unexplained anemia and low testosterone when compared to placebo.Evidence: 1-year RCT (n = 788) (Roy et al., 2017)AAS type: ND↑ Hb levels in osteoporotic older women when compared to placebo.Evidence: 2-year RCT (n = 65) (Frisoli et al., 2005). Here, GSTM1 is linked to anemia.