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Comparative changes of fat digestibility and fat accumulation by the carbon chain length of dietary glycerol tri-homogenous fatty acids in rats

Comparative changes of fat digestibility and fat accumulation by the carbon chain length of dietary glycerol tri-homogenous fatty acids in rats

Nutrition Research 14(12): 1821-1830

The present study was undertaken to investigate the influence of the carbon chain length of dietary glycerol tri-homogenous fatty acid on fat digestibility and body fat accumulation in rats. Thirty-six Wistar male rats were divided into six groups and fed the semipurified C8, C10, C12, C14, C16, C18 triglyceride diets, respectively. Body weight was significantly lower (p lt 0.05) in rats fed the C14, C16 and C18 diets than in rats fed the C8, C10 and C12 diets. Weights of adipose tissues and apparent fat digestibility were markedly low in the C16 and C18 fed rats. In these groups, fat content of whole-body carcass was significantly lower (p lt 0.05), but moisture, ash and protein contents were significantly greater (p lt 0.05) than those of the other groups. Fatty acid profile of epididymal adipose tissue revealed that dietary C8:0 was not directly incorporated into adipose tissues, and only a small amount of dietary C10:0 was directly deposited as body triglycerides. Meanwhile, dietary C12:0 was extensively incorporated into adipose tissues when compared to those of C8 and C10 rats. The present study indicated that apparent fat and energy digestibilities of dietary glycerol tripalmitin and glycerol tristearin were remarkably lower than the glycerol tricaprylin, tricaprin, trilaurin and trimyristin, which results in lower fat accumulation in the C16 and C18 fed rats.

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Accession: 002581786

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DOI: 10.1016/s0271-5317(05)80718-3

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