ron source and absorption 2. Nonheme iron Fe3+→ stomach acid,vitC→Fe2 3. Contains: 10-15mg/d; 10% absorbed 4. Absorption portions: duodenum and upper part of jejunum 5. Absorption rateIron source and absorption 2.Nonheme iron： Fe3＋→stomach acid，VitC →Fe2+ 3.Contains:10-15mg/d;10% absorbed 4.Absorption portions：duodenum and upper part of jejunum 5. Absorption rate