Facebook post by University of Helsinki

The more blood you have, the more red blood cells there are to transport oxygen to the tissues. Therefore haemoglobin can tell us a lot about our health.
Haemoglobin reveals your physical condition | University of Helsinki l.facebook.com

Haemoglobin levels can tell us a lot about our health. Red blood cells transport oxygen to tissues more efficiently when haemoglobin levels are in order.