摘要: 烘焙食品在我国居民膳食结构中所占的比重越来越大,然而,其能量密度高、营养素密度低的特点不符合人们对健康膳食的需求,迫切需要通过配方改良赋予烘焙食品营养均衡和保健的功能,从而促进我国烘焙产业升级。本文提出烘焙食品的营养缺陷健康安全风险,分析实施烘焙食品的减脂、减糖、减盐和营养功能强化策略所面临的技术瓶颈,探讨在健康烘焙食品中优化营养标签、补充健康因子的可行性,展望未来烘焙食品的研究方向。本文将为新型健康烘焙食品的开发提供理论借鉴和参考。
Abstract: Bakery products are taking an increasingly high percentage in the diet of Chinese residents. However, bakery foods are high in energy density and low in nutrient density, which does not meet people’s requirement for a healthy diet. Food reformulation in bakery is highly desired to achieve nutrition balance and health promotion function in them, and thus promote upgrading and transformation of China’s baking industry. In this work, the health risk and food safety problems arising from the unbalanced nutrition composition of the traditional bakery products are put forward. The technical bottleneck caused by fat, sugar and salt reduction, and nutrient and healthy factor fortification are discussed. The feasibility of optimizing the nutrition labeling and supplementing healthy factors in bakery products is analyzed and the perspective of future research is addressed. This work provides theoretical reference for the development of innovative health beneficial bakery products.
图 1 烘焙食品的配方改良策略
Figure 1. The strategy of reformulation in baking products
表 1 脂肪替代物在烘焙产品中应用举例
Table 1 Examples of fat replacers used in bakery products
烘焙产品烘焙代脂肪类型配方改良方案低脂产品感官品质健康功效文献 海绵蛋糕、玛芬蛋糕、重油蛋糕脂肪替代品蔗糖聚酯替代起酥油替代比例50%~75%:比容降低、硬度和咀嚼度上升。降低热量、减少胆固醇吸收[21]油凝胶巴西棕榈蜡10%+茶籽油90%表 2 功能性甜味剂在烘焙产品中应用举例
Table 2 Examples of the functional sweeteners used in bakery products
烘焙产品蔗糖替代方案应用效果健康功效文献 纸杯蛋糕纸杯蛋糕制作中用D-阿洛酮糖表 3 烘焙产品的减盐方案
Table 3 Strategy of salt reduction in bakery products
减盐策略烘焙产品实施方案应用效果文献 逐步控盐法式面包三年内,对22个面包店实施减盐实验,将面包中NaCl含量逐渐减少30%:1~3月每月减少10%,4~36月维持这一低盐表 4 营养和功能因子强化提升烘焙食品营养素密度的方案
Table 4 Strategies of enhancement of nutritive density in bakery products by fortification of nutrients and functional components
烘焙产品营养素/健康因子实施方案产品感官品质营养与健康功效文献 无麸质蛋糕全豆粉稻米粉与两种豆粉(绿豆和豇豆)按80:20,65:35和50:50的比例混合制备无麸质蛋糕。增加豆粉比例造成蛋糕比容下降、气孔减少、硬度增大、外表塌陷;豆粉与稻米粉质量1:1时蛋糕结构稳定,感官评分与小麦蛋糕相当。增加蛋白质、膳食纤维和微量元素含量[49]无麸质面包豆类分离蛋白分别用大豆分离蛋白浓缩液、豌豆分离蛋白或羽扇豆蛋白替代无麸质面包配方中6.7%的淀粉和3.3%的果胶。大豆蛋白:增加面团存储和损耗模量,面包体积减小,气孔密度降低,直径>5 mm的气孔增多,面包皮色泽加深;豌豆蛋白、羽扇豆蛋白:与大豆蛋白组相似,但不影响面包比容。增加蛋白质含量,优化氨基酸组成[51]全麦面包豆荚粉绿豆、豌豆、牧豆全荚粉分别替代全麦面包配方中20%的全麦粉。绿豆和豌豆面包蛋白含量高,牧豆面包纤维含量高。牧豆面包比容与全麦面包相比,近降低7%。以上添加豆荚粉面包感官可接受度高。增加蛋白质、膳食纤维和多酚类物质[50]白面包膳食纤维分别添加角豆纤维、豌豆纤维、菊粉替代3%小麦粉。添加纤维粉使得面包更松软,面包比容略低,感官评分6.1~6.3(对照6.8),总体可接受。添加角豆纤维和菊粉可改善面团发酵进程。补充膳食纤维[52]面包益生菌乳酸菌L. acidophilus经乳清蛋白包埋后,按1%浓度分散于5%淀粉溶液,形成含有益生菌的可食涂抹液,涂膜于半熟面包表面,180 ℃烘焙16 min。涂抹层一定程度上影响面包气孔结构、增加水分活度和降低断裂应力,但感官评分可接受度高。烘焙和储藏24 h后活菌数为7 lg CFU/70 g 面包。补充益生菌[53]面包天然抗氧化成分向全麦面包配方中添加一定量绿茶粉。添加量1 g绿茶粉/100 g面粉时,面包比容、硬度、回弹力不受影响,面包贮藏期的氧化稳定性提高。抗自由基氧化[54]绿茶儿茶素萃取组分(儿茶素>65%)按一定比例添加面包SILOW C, AXEL C, ZANNINI E, et al. Current status of salt reduction in bread and bakery products-A review[J]. Journal of Cereal Science,2016,72:135−145. doi: 10.1016/j.jcs.2016.10.010
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