08 Jun 2020 --- Cancer patients’ responses to chemotherapy drugs can be changed by microbes in the gut. This is according to a study from the University of Virginia (UVA), which revealed that common components of a daily diet, for example amino acids, could either increase or decrease both the effectiveness and toxicity of the drugs used for cancer treatment. The researchers note that this discovery opens an important new avenue of medical research and could have major implications for predicting the right dose and better controlling the side effects of chemotherapy. This could also help explain differences seen in patient responses to chemotherapy that have baffled doctors until now.