Edible seeds and nuts can contribute to an adequate intake of protein, particularly in vegetable-based diets. However, there are relatively few reports with insufficient data regarding the protein quality of these foods, especially of edible seeds and nuts from Brazil. The aim of this study was to investigate the chemical composition and in vivo protein quality of two edible seeds (baru almond and peanut) and two nuts (Brazil nut and cashew nut) grown in Brazil. The proximate composition and the amino acid profile were analyzed. The true protein digestibility and the protein quality of these foods were evaluated by bioassay with male weanling Wistar rats over a period of 14 days, and the Protein Digestibility Corrected Amino Acid Score (PDCAAS) was estimated. Edible seeds and nuts presented high contents of proteins (16.3 to 32.3 g/100g), lipids (42.7 to 57.9 g/100g) and dietary fibers (6.5 to 14.3 g/100g). Lysine was found to be the limiting amino acid in baru almond, peanut and Brazil nut, which had amino acid scores ranging from 71% to 76%. Cashew nut had no limiting amino acid. These foods showed high protein digestibility (around 90%) except for baru almond (75%), and their PDCAAS values varied significantly (57%, for baru almond, and 90%, for cashew nut). The edible seeds and nuts grown in Brazil provide a high density of energy and nutrients and they can be used as complementary sources of proteins.
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机译：可食用的种子和坚果可以促进蛋白质的充分摄入，尤其是在以蔬菜为基础的饮食中。但是，关于这些食品（尤其是来自巴西的可食用种子和坚果）蛋白质质量的数据报道相对较少。这项研究的目的是调查巴西种植的两种可食用种子（巴鲁杏仁和花生）和两种坚果（巴西坚果和腰果）的化学成分和体内蛋白质质量。分析了附近的组成和氨基酸谱。通过对雄性断奶的Wistar大鼠进行14天的生物测定来评估这些食物的真实蛋白质消化率和蛋白质质量，并估算蛋白质消化率校正氨基酸评分（PDCAAS）。可食用的种子和坚果的蛋白质含量较高（16.3至32.3 g / 100g），脂质（42.7至57.9 g / 100g）和膳食纤维（6.5至14.3 g / 100g）含量较高。发现赖氨酸是巴鲁杏仁，花生和巴西坚果中的限制性氨基酸，其氨基酸评分范围为71％至76％。腰果没有限制性氨基酸。这些食物除巴鲁杏仁（75％）外，都具有很高的蛋白质消化率（约90％），其PDCAAS值也有显着差异（巴鲁杏仁为57％，腰果为90％）。在巴西种植的可食用种子和坚果提供高能量和养分密度，可以用作蛋白质的补充来源。
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