Food waste utilization is a strategy to reduce residues and add value to new products. Fruits, particularly their residues, are associated with a decreased risk of cancer; this may be attributed to the presence of phytochemical constituents, such as polyphenols. Melon is a fruit consumed worldwide, especially in tropical countries. The high consumption of melon is accompanied by large amounts of waste generated from its processing, including waste from barks, peels and seeds. These data are significant, especially in the current scenario of sustainable development, with the proposal to reduce waste in industries and foodservice sectors. This review summarizes the current state of knowledge regarding melon residues (Cucumis melo L.) and their role in health promotion and biotechnology applications. Discussion of the potentialities of the melon and its application for value aggregation are encouraged, based on its nutritional properties, antioxidant capacity, antiproliferative effect and its potential for substrate to solid state fermentation. Melon wastes, such as seeds and peel, are of interest thanks to their bioactive compounds that makes them a good alternative for valorization of fruit processing by-products.

The production of collective meals in institutional restaurants demands a great use of natural resources. The search for strategies to reduce negative environmental impacts in this sector is essential to offer meals that are not only healthy but also sustainable. In this study the evaluation of water footprint (WF) of menus offered in a public university restaurant located in the northeast of Brazil and the verification of the origin of foodstuff purchased to compose the menus in 2 months were carried out. The study is transversal, descriptive, and exploratory and the data were collected between March and April 2018. Water footprint of 112 traditional and vegetarian menus was calculated and the results showed that the WF of traditional menus was higher (p < 0.0001) than the vegetarian menus. Weekly average per capita of WF was 2752.0 L for traditional menus and 1113.9 L for the vegetarian option, with animal protein intake in the traditional version being the main factor for this difference. It was identified that 49.47% of the foods used in the studied period originated from the same state where the restaurant is located, with fresh vegetables being the food group with the highest contribution. Thus, we conclude that although the restaurant purchases local food products, the environmental impact of the choice of foods that is included in the menus must be taken into account. The utilization of local foodstuff and the decrease of animal protein in the menus can be a good strategy to encourage sustainable actions in food services meal production.

This study aimed to evaluate aspects of sustainable nutrition in Public Educational Institutions Restaurants (PEIR) in a Brazilian state. Cross-sectional descriptive research was conducted in six PEIR. Purchased foodstuffs for a one-month period were investigated from the perspective of their origin (place of production), processing degree and nutritional profile. The presence of Genetically Modified Organisms (GMO) in packaged foodstuffs was also evaluated. Regarding served meals, a four-week period was evaluated in each PEIR considering the Water Footprint (WF) and the nutrient composition of the lunch meals. Results showed that 31.6% of foodstuffs purchased in the period evaluated were from national origin. Analysis of the processing degree of food purchased showed 64.8% unprocessed or minimally processed foods. However, 60.8% of the foodstuffs purchased in a one-month period presented sodium excess, 46.9% had an excess of saturated fat and 40.1% contained an excess of free sugar. The presence of GMO was observed in 9.2% of packed foods. The meals showed a per capita WF average of 2165.8 liters, an energy supply of 834.6 kcal and 1,289.6 mg of sodium per meal served. Foodstuff purchase and menu planning are essential steps towards achieving sustainable meal production and the results showed that foodstuffs purchased in institutional restaurants during the evaluated period was not in line with the precepts of a healthy and sustainable diet. Studies that assess the impact of meal production on the different dimensions of sustainable nutrition are essential to better understand this complex production process.

Undergraduates may face challenges to assure food security, related to economic and mental distress, especially during the COVID-19 pandemic. This study aimed to assess food insecurity and its associated factors in undergraduates during the COVID-19 pandemic. An online cross-sectional study was conducted from August 2020 to February 2021 with 4775 undergraduates from all Brazilian regions. The questionnaire contained socio-economic variables, the validated Brazilian food insecurity scale, and the ESQUADA scale to assess diet quality. The median age of the students was 22.0 years, and 48.0% reported income decreasing with the pandemic. Food insecurity was present in 38.6% of the students, 4.5% with severe food insecurity and 7.7% moderate. Logistic regressions showed students with brown and black skin color/race presented the highest OR for food insecurity; both income and weight increase or reduction during the pandemic was also associated with a higher OR for food insecurity, and better diet quality was associated with decreased OR for food insecurity. Our study showed a considerable presence of food insecurity in undergraduates. Policy for this population must be directed to the most vulnerable: those with brown and black skin color/race, who changed income during the pandemic, and those presented with difficulties maintaining weight and with poor diet quality.

The purchase of food from family farming in public institutions in Brazil was boosted by the implementation of the public call modality. The National School Feeding Program—PNAE— and the Food Acquisition Program—PAA— are world references in terms of purchasing food from family farming. However, hindrances are still observed regarding the participation of small farmers in public purchase of food, reducing their participation and scope of the food products available. Using a cross-sectional approach, this study analyzed food from family farming purchased by federal institutes of education located at the northeast region of Brazil to characterize the profile of family farmers participating on public calls, identify the food required and verify the processing level of food present into these documents. The data obtained indicate that family farmers supply mainly in natura or minimally processed foods, especially fruits. Meat and meat products were not present and processed foods, such as cheese, were not purchased extensively from family farmers by federal institutes, even when farmers were grouped into cooperatives and associations. Failure to comply with sanitary requirements required in the public call process was the main reason for the non-homologation of some food from family farming. The data found in this study show that despite the advances that allowed the purchase of food from family farming in public educational institutions, it is necessary to find ways to increase the diversity of food. Investing in improving structural conditions would be a way to increase the quality and diversity of food provided by family farming in public institutions, contributing to the environmental, social, and health dimensions of sustainability.

Current food systems are associated with the unsustainable use of natural resources; therefore, rethinking current models is urgent and is part of a global agenda to reach sustainable development. Sustainable diets encompass health, society, economy, culture as well as the environment, in addition to considering all the stages that make up the food production chain. This study aimed to perform a review on the importance of using environmental footprints (EnF) as a way of assessing the environmental impacts of food systems. The most used EnF to assess impacts related to the food system was the carbon footprint, followed by the water footprint, and the land use footprint. These EnF usually measured the impacts mainly of the current diet and theoretical diets. Animal-source foods were the ones that most contribute to the environmental impact, with incentives to reduce consumption. However, changing dietary patterns should not be restricted to changing behavior only, but should also involve all stakeholders in the functioning of food systems. We conclude that EnF are excellent tools to evaluate and guide the adoption of more sustainable diets, and can be applied in different contexts of food systems, such as food consumption analysis, menu analysis, food waste, and inclusion of EnF information on food labels.