Good practitioners are being led to bad conclusions by some patients’ pathology results. Not because they can’t interpret them or the testing has no merit but because they just don’t know when to discard a set because they are ‘bad’. Occasionally, the fault of the pathology company but much more often the fault of the patient and the referring practitioner, who has not educated the patient correctly about what to do and not do prior to blood collection for certain tests. This recording clearly describes the 7 classic give-away patterns of ‘Bad Bloods’ which will enable you to spot them fast in the future. In addition to this. while we are unlikely to know the idiosyncrasies of very lab our patients will ever have done, knowing the ideal collection times and conditions for the most common ones assists you and your patients to avoid any in the future – handy clinic resource included.