Hemoglobin 112g/L is normal in adult women. Hemoglobin 112g/L may be normal and physiologic or abnormal in the case of newborns, adult males, and children. Hemoglobin is a class of proteins responsible for transporting oxygen in living organisms and consists of bead protein, four molecules of ferrous hemoglobin. If an adult female’s hemoglobin shows 112g/L, which is normal because the normal value of hemoglobin in adult females is 110 to 150g/L, then there is no need to worry too much. In addition, the normal range of hemoglobin for adult males is 120 to 160 g/L, then 112 g/L is slightly lower and may be due to anemia, acute blood loss, etc. If it is infants, children before the age of 15, it may be a normal physiological phenomenon, because this stage of rapid growth and development of children, the relative lack of hematopoietic raw materials, hemoglobin is lower than the norm 10% to 20%, if significantly lower than the normal value, can not be ruled out the disease factors. Regarding whether hemoglobin 112g/L is normal or not, it also needs to be analyzed in combination with different groups, and it is recommended to consult a doctor in time to be judged by the doctor.