著者

Ayumi Fukazawa Takuya Karasawa Yuma Yokota Saki Kondo Toshiaki Aoyama Shin Terada

出版者

Japan Oil Chemists' Society

雑誌

Journal of Oleo Science (ISSN:13458957)

巻号頁・発行日

vol.70, no.7, pp.989-993, 2021 (Released:2021-07-01)

参考文献数

19

被引用文献数

2

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We previously reported that consuming a ketogenic diet containing medium-chain triacylglycerols (MCTs) might be a valuable dietary strategy for endurance athletes. However, the long-term safety of the diet has not been established, and there is a concern that a higher intake of MCTs increases the liver triacylglycerol content. In this study, we found that consuming an MCT-containing ketogenic diet for 24 weeks decreased, rather than increased, the liver triacylglycerol concentration and did not aggravate safety-related blood biomarkers in male Wistar rats. Our results may therefore suggest that the long-term intake of a ketogenic diet containing MCTs may have no deleterious effects on physiological functions.

著者

Yuma Yokota Ayumi Fukazawa Yudai Nonaka Takuya Karasawa Michiyo Kimura Shin Terada

出版者

Japan Oil Chemists' Society

雑誌

Journal of Oleo Science (ISSN:13458957)

巻号頁・発行日

vol.72, no.9, pp.849-858, 2023 (Released:2023-08-31)

参考文献数

35

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Dietary intake of medium-chain triacylglycerols (MCTs) is known to alleviate obesity. MCTs have also been suggested to beneficially influence protein metabolism. This study evaluated the effects of dietary intake of MCTs on energy restriction-induced weight control and loss of skeletal muscle. Rats were divided into the following groups: 1) AL-LCT group that received the AIN-93G-based control diet containing long-chain triacylglycerols (LCTs) ad libitum, 2) ER-LCT group fed the control diet with 30% energy restriction, and 3) ER-MCT group fed a diet containing MCTs with 30% energy restriction. After the 4-wk dietary treatment, both energy-restricted groups had significantly lower body weight than the AL-LCT group and rats in the ER-MCT group were significantly lighter than those in the ER-LCT group. In contrast, the extent of energy restriction-induced loss of skeletal muscle was not significantly different between the two energy-restricted groups, resulting in an increase in muscle mass relative to body weight in the ER-MCT group. Despite maintaining the lower body weight, dietary intake of MCTs did not further influence signaling pathways involved in protein synthesis or breakdown. These results suggest that intake of MCTs could be a valuable dietary intervention to maintain a lower body weight and increase relative muscle mass without negative effects on skeletal muscle protein metabolism.