There are some side effects with blood transfusions that may be an experiment in itself. For example, blood bags can transfer plasticizers to the blood, which i

There are some side effects with blood transfusions that may be an experiment in itself. For example, blood bags can transfer plasticizers to the blood, which is a method to detect if athletes have been doping. https://www.wada-ama.org/en/resources/scientific-research/overall-approach-blood-transfusion-detection-autologous-homologous https://www.wada-ama.org/en/resources/scientific-research/ov...