Why blood is not collected from a person having a haemoglobin content of less than 12.5 gm/l00ml?
The stipulated haemoglobin content of 12.5 gm/100 ml for a donor is the standard for a healthy person. Persons having lessHb content than the prescribed one cannot be treated as healthy donor having sufficient Hb for donations and hence are not allowed to donate blood. Further, blood weak in Hb content does not help the patient much in carrying oxygen to cells.