Three weeks ago blood tests showed I was severely anaemic, 74 grams of haemoglobin per litre of blood, normal levels are around 120 g/l, so I was given a unit (240 ml) of whole blood and an iron infusion.Prior to yesterday's colonoscopy & gastroscopy checks another blood sample was collected. My haemoglobin is up to a much more healthy 122 g/l now.