Effects of Short-term Therapeutic Fasting on Nausea and Vomiting Due to Chemotherapy

Inclusion Criteria: * patient starting a treatment by chemotherapy ABVD or AVD * patient affiliated to a social security scheme * patient who gives his informed consent before any procedure related to the study Exclusion Criteria: * patient with diabetes * patient with recent gastric ulcer * patient with low BMI (less than 18,5 for patients under 70 or less than 21 for patient over 70) * albuminemia \<35 * patient wiht loss weight \> 10% in 6 months * pregnant or lactating women * chronic alcoholism * unable to understand the objectives and risks of the study * patient with psychiatric desorder, under guardianship or under judicial protection * patient who cannot read