Principais fatores associados aos índices de desperdício em unidades de alimentação e nutrição: uma revisão integrativa Abstract The objective of this work was to perform an integrative review about the main factors associated to the indices of waste in Food and Nutrition Units. Through the descriptors "collective feeding", "waste" and "feeding and nutrition units", searches were carried out in electronic databases (LILACS, MEDLINE, Scielo and Google Scholar), selecting complete articles that addressed the thematic waste in Portuguese and English, published between 2008 and 2016. According to results found in the literature, the main factors that contribute to the high percentage of waste in Food and Nutrition Units are the high levels of Rest-ingestion due to the lack of orientations to the diners, lack of training of the manipulators, failures during storage and pre-preparation, high correction factors, failures during planning and receiving of raw material and lack of standardization in the preparation of the preparations. In this way, the importance of good planning, monitoring and training of employees during all stages of receiving, producing, storing distribution is verified. As well as, the awareness of diners about reducing levels of waste through lectures, posters and printed materials.