Evaluation of the Influence of Short Term Fasting Diet on Chemotherapy-induced Toxicities in Breast Cancer Patients

This is a clinical trial aiming to assess the effect of fasting diet on chemotherapy - induced toxicities in breast cancer patients. The study will have an intevention group and a control group. The intervention group will follow a fasting diet of 60 hours (36h prior chemotherapy and 24h after the end of chemotherary), while the control group will follow regular (standard) diet. At the meantime of the chemotherapy cycles, the intervention group will be recommended to follow the Mediterranean diet. The main questions this study is aiming to answer is whether short term fasting diet influences chemotherary - induced toxicities and if it is easy to be implemented.