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Abstract
Broccoli (Brassica oleracea L. var. Italica) is largely consumed all over the world and has a high economic importance. Likewise, broccoli contains high levels of glucosinolates, carotenoids and total phenols, which are related with the prevention of chronic diseases. The present project’s objective was to evaluate the effect of industrial freezing on the stability of bioactive molecules in seven commercial broccoli cultivars (Tlaloc®, Endurance®, Florapack®, Domador®, Steel®, Iron Man® and Avenger®). In general, industrial freezing increased the extractability of total glucosinolates, whereas total phenols remained constant in most broccoli cultivars. Likewise, broccoli subjected to industrial freezing showed higher levels of total carotenoids (∼60–300% higher) as compared with fresh broccoli. Results suggest that bioactive compounds in frozen broccoli would be more bioavailable than in raw.
Declaration of interest
This study is based upon research supported by research funds from the Tecnológico de Monterrey – Research Chair Initiative (CAT 161) and Consejo Nacional de Ciencia y Tecnología (CONACYT, México) Grant (177012). We also would like to thank Frigorizados La Huerta, S.A. de C.V. for providing broccoli cultivars. Author A.B.-M. also acknowledge the scholarship (285802) from the Consejo Nacional de Ciencia y Tecnología (CONACYT, México).