The effect of low and moderate fat intakes on the postprandial lipaemic and hormonal responses in healthy volunteers
1999
Shishehbor, F. | Roche, H.M. | Gibney, M.J.
Present literature indicates that whereas an acute fat intake of 5 g does not elicit a postprandial triacylglycerolaemic response, 20 g of fat does. Since 67% of fat intake occasions involve fat doses of less than 20 g, the present study examined the effect of a relatively low-fat (LF) meal (0(.)2 g/kg body weight; mean 14 g) on postprandial triacylglycerol (TAG) metabolism, compared with a high-fat (HF) meal (0(.)6 g/kg body weight; mean 43 g), a fat dose which is more typical of laboratory studies. Plasma- and chylomicron-TAG concentrations increased significantly (P < or = 0(.)001) following both meals, and the increase was significantly (P < or = 0(.)02) greater after the HF meal. The postprandial areas under the curves and maximal postprandial TAG concentrations for plasma- and chylomicron-TAG were significantly higher following the HF meal (P < or = 0(.)05). Postprandial plasma insulin and gastric inhibitory polypeptide concentrations increased significantly (P < or = 0(.)001) after each meal, but there was no difference between the two meals. These data show that modest amounts of fat in a meat will elicit a measurable postprandial TAG response. Since postprandial lipaemia affects the composition and concentration of the TAG- and cholesterol-rich lipoproteins, controlling dietary TAG supply may influence the metabolic fate of these lipoproteins.
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