Laboratório de Estudos em Química Aplicada (LEQA), Departamento de Química Analítica e Físico-Química, Universidade Federal do Ceará, Campus do Pici, 60451-970 Fortaleza, Ceará, Brazil.
Laboratório de Estudos em Química Aplicada (LEQA), Departamento de Química Analítica e Físico-Química, Universidade Federal do Ceará, Campus do Pici, 60451-970 Fortaleza, Ceará, Brazil.
Food Res Int. 2017 Oct;100(Pt 1):566-571. doi: 10.1016/j.foodres.2017.07.054. Epub 2017 Jul 23.
Only some of ingested nutrients are available for absorption by the organism. The foods generally are submitted to some heat processing that may interfere in the bioaccessibility of nutrients. There are no studies of the influence of cooking under vacuum (sous vide) on the bioaccessibility of minerals. This study evaluated the in vitro bioaccessibility of Ca, Cu, Fe, K, Mg and Zn in bovine liver samples after traditional cooking in water and using the sous vide procedure. All heat treatments of bovine liver promoted the increase of the bioaccessibility of Ca, Cu, Fe, K and Mg, except for Zn when the effect was the opposite. The sous vide method provided higher bioaccessibility of these minerals than cooking in boiling water, except for K when both methods presented equivalent values. Samples of raw liver and liver cooked using sous vide method presented the following percentage of bioaccessible fraction, respectively: 39.7% and 95.8% (Ca), 8.78% and 26.9% (Cu), 8.80% and 39.5% (Fe), 30.2% and 42.6% (K), 26.4% and 43.9% (Mg), 24.8% and 36.3% (Zn). Thus, under the aspect of improvement availability of studied minerals by organism, the sous-vide technique was the most suitable to cook bovine liver.
只有一部分摄入的营养素可被机体吸收。食物通常要经过一定的热处理，这可能会影响营养素的生物利用度。目前还没有研究真空烹饪（低温慢煮）对矿物质生物利用度的影响。本研究评估了传统水煮和真空低温烹饪两种方式处理牛肝后，钙、铜、铁、钾、镁和锌的体外生物利用度。所有的热处理方法都提高了牛肝中钙、铜、铁、钾和镁的生物利用度，但锌的情况正好相反。与传统水煮相比，低温慢煮法能提供更高的生物利用度，而钾的情况则相反，两种方法的数值相当。生食牛肝和低温慢煮牛肝的生物可利用分数分别为：39.7%和 95.8%（钙）、8.78%和 26.9%（铜）、8.80%和 39.5%（铁）、30.2%和 42.6%（钾）、26.4%和 43.9%（镁）、24.8%和 36.3%（锌）。因此，从改善机体对所研究矿物质的吸收利用率方面来看，低温慢煮法最适合烹饪牛肝。
