与和脂肪相比,过度养多不和脂肪不会对超重个体的瘦组织积累产生差异影响:随机对照试验
Fredrik Rosqvist1, Jonathan Cedernaes2, Andrés Martínez Mora3
1Department of Public Health and Caring Sciences, Clinical Nutrition and Metabolism, Uppsala University, Sweden.
The American journal of clinical nutrition
|April 18, 2024
概括
过度养和脂肪酸 (SFA) 或多不和脂肪酸 (PUFA) 对超重个体的瘦组织增加没有不同的影响. 这表明饮食脂肪类型可能不会显著影响这个人群的肌肉质量积累.
科学领域:
- 营养科学 营养科学
- 代谢健康 代谢健康
- 身体构成 身体构成
背景情况:
- 脂肪酸在骨肌肉功能和瘦组织体积中起作用.
- 之前的研究表明,多不和脂肪酸 (PUFA) 在瘦人群中比和脂肪酸 (SFA) 促进了更大的瘦组织积累.
研究的目的:
- 为了确定过度养SFA与PUFA是否对超重个体的瘦组织积累有不同的影响.
- 为了确定瘦组织积累的潜在决定因素.
- 调查SFA和PUFA度与大量基于人口的样本中的瘦组织体积之间的关联.
主要方法:
- 一项双盲随机对照试验,涉及61名超重成年人,在8周内过度食SFA (棕油) 或n-6PUFA (向日油).
- 通过MRI评估的瘦组织.
- 替代模型和英国生物库数据 (n=13,849) 对食脂肪与瘦组织相关性的分析.
主要成果:
- 过度养的SFA和PUFA都导致了类似的体重增加和瘦组织积累.
- 没有观察到对循环氨基酸,肌素或IL-15的差异性影响.
- 英国生物库的数据显示,循环脂肪酸和瘦组织之间没有显著的,取决于性别的关联.
结论:
- 过度养SFA或PUFA不会对超重个体8周以上的瘦组织积累产生差异性影响.
- 饮食脂肪类型似乎对这一群体的瘦组织积累没有特定影响.
- 这些发现得到了大型队列研究中的替代模型的支持.
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