Department of Food Science and Nutrition, California Polytechnic State University, San Luis Obispo, CA 93407, USA.
Cal Poly Personalized Nutrition Research Group, California Polytechnic State University, San Luis Obispo, CA 93407, USA.
Int J Environ Res Public Health. 2021 Nov 13;18(22):11939. doi: 10.3390/ijerph182211939.
Plant-based diets have become increasingly popular in the past decade, with approximately 11% of Americans self-identifying as vegan or vegetarian and many others trying to reduce meat consumption. Due to increasing interest, the plant-based food market has significantly expanded, with several innovative products serving as alternatives to animal-based products. One such example is almond protein powder, a new protein supplement created as an alternative to whey protein. Due to the novelty of almond protein products, little is known regarding how well the protein supplement supports nitrogen metabolism. The effects of both an almond-based protein beverage and a whey-based protein beverage on nitrogen balance are investigated in the work presented herein. Twenty female college students aged 20-25 years were randomly assigned to consume either an almond- or whey-based protein drink twice daily for one week; 24-h urine collection was performed at the baseline and endpoint of the 7-day treatment period and nitrogen balance was assessed. Body composition and hydration status were also assessed. Both protein sources (almond and whey) were able to notably improve nitrogen balance, thus indicating that almond protein powder may be a functional plant-based alternative to whey protein powder and may be of interest in future research regarding muscle mass and body composition improvement.
在过去十年中，植物性饮食变得越来越流行，大约有 11%的美国人自认为是严格素食主义者或素食主义者，还有许多人试图减少肉类消费。由于兴趣的增加，植物性食品市场显著扩大，有几种创新产品作为动物产品的替代品。杏仁蛋白粉就是一个很好的例子，它是一种新的蛋白质补充剂，作为乳清蛋白的替代品。由于杏仁蛋白产品的新颖性，人们对这种蛋白质补充剂在氮代谢方面的支持作用知之甚少。本文研究了一种基于杏仁的蛋白质饮料和一种基于乳清的蛋白质饮料对氮平衡的影响。20 名年龄在 20-25 岁的女性大学生被随机分配到每天两次食用杏仁或乳清蛋白饮料，持续一周；在 7 天治疗期的基线和终点进行 24 小时尿液收集，并评估氮平衡。还评估了身体成分和水合状态。两种蛋白质来源（杏仁和乳清）都能显著改善氮平衡，这表明杏仁蛋白粉可能是乳清蛋白粉的一种功能性植物性替代品，可能在未来关于肌肉质量和身体成分改善的研究中具有吸引力。
