A 25 y.o. woman complained of fatigue, hair loss and brittle nails. The examination revealed pallor of skin, Ps- 94/min, BP- 110/70 mm Hg. On blood count: Hb-90 g/L, RBC- 3,5- 1012/l, C.I.- 0,7; ESR - 20 mm/h. Serum iron level was 8,7 mcmol/l. What treatment would you initiate?