Investigations revealed hypochromic microcytic anemia with Hb 10.8, ESR 8, CRP 5.6, with negative RF and ANA, and normal LFT, TFT, renal profile, Vitamin D, and normal creatine kinase (CK). She was seen in the allergy department and treated with prednisolone 40 mg daily for a week with excellent response. Here, GSTM1 is linked to microcytic anemia.