Are detox juices a good source of nutrients?

Santos, I.C.; Albuquerque, T.G.; Silva, M.A.; Costa, H.S.

http://hdl.handle.net/10400.18/5315

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Abstract(s)

Introduction: Detox juices consist in a mixture of fruits and vegetables, and are very popular among consumers. They are considered as a good source to eliminate toxins, promote health, help with weight loss and are often used as a replacement for the main meals. However, the scientific evidences which support their benefits are very limited and their suitability to replace main meals is not clear. The main objective of this study was to determine the nutritional contribution of two detox juices and to evaluate their appropriateness/impact as a meal replacer. Materials and Methods: In 2016, 5 types of fruits (orange, pear, banana, strawberry, kiwi), 4 types of vegetables (spinach, carrot, pumpkin, beetroot) and oilseeds were acquired in supermarkets, and were combined to prepare 2 recipes of detox juices. Samples were manually separated between edible and non-edible portion. The nutritional characterization of the detox juices was carried out by determining the following parameters: moisture, ash, protein, total fat and dietary fibre. The energy value (kcal/kJ) and the available carbohydrates were determined by calculation. The moisture content was determined by gravimetric method (AOAC 952.08, 2000), using a dry air oven (Memmert, Germany) and total ash content by a process of incineration at 525 ºC, according to AOAC 923.03. For total protein content, the Kjeldahl method was used, according to AOAC 991.20. For total fat content, acid hydrolysis followed by extraction with petroleum ether using a Soxhlet apparatus (Soxtec™ 2050, Foss, Hilleroed, Denmark) was used, and for total dietary fibre an enzymatic-gravimetric method (AOAC, 2000) was applied. The nutritional contribution of the juices for adults was carried out using the reference intakes for energy and nutrients reported in Regulation (EU) n.º 1169/2011. Results: The analyzed juices had an energy value that varied between 26.3 and 64.6 kcal/100 g of edible portion, and contributed with 1% and 3%, respectively, for the energy reference intake. Water was the major constituent (varying from 83.4 ± 0.01 to 92.7 ± 0.04 g/100 g of edible portion) in the analysed samples, followed by carbohydrates (ranging between 5 ± 0.05 and 13.2 ± 0.06 g/100 g of edible portion). Their content in protein, total fat and dietary fibre was also low. Discussion and Conclusions: According to the results obtained, we can conclude that these detox juices should not be used as a substitute of main meals. They present a total energetic value and a macronutrients composition lower than the recommendations.

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Abstract publicado em: Translational Research and Innovation in Human and Health Science, Annals of Medicine. 2018;50(Sup1):S119-20, doi:10.1080/07853890.2018.1427445