在过去的几十年,许多专家和委员会对热能与蛋白质的需要量作了广泛的研究。早期的研究着重于测定健康人群日常的蛋白质摄入量,随后开展了代谢研究,所得的结果则更为精确。为了肯定蛋白质的需要量,又采用了吃不含蛋白质膳食氮损失的计算法。近年来则认为,用长期或短期摄入不同水平蛋白质的氮平衡方法来测定人体蛋白质需要量较为合理。现 In the past decades, many experts and committees have conducted extensive research on the requirements for heat and protein. Earlier studies focused on determining daily protein intake in healthy people, followed by metabolic studies that resulted in more accurate results. In order to confirm the protein requirements, but also used to eat protein-free dietary nitrogen loss calculation. In recent years, it is believed that it is more reasonable to determine the human protein requirement by using the nitrogen balance method of taking long-term or short-term intake of different levels of protein. Now