Twelve subjects with radiolucent gall stones and bile supersaturated with cholesterol were studied after six weeks each on diets which contained 112 g and 16 g respectively of refined (fibre depleted) sucrose but which allowed free access to other foods. Energy intake was 24.5% higher on the high sugar diet and body weight ended 1.4 kg higher than on the low sugar diet. Biliary secretion rates of cholesterol, phospholipid and bile acid, measured by a perfusion technique, were similar on the two diets, as were the bile acid pool sizes measured by isotope dilution. Cholesterol saturation index of fasting 'gall bladder' bile was 1.30 +/- 0.11 and 1.37 +/- 0.14 on high and low sugar respectively (NS). Plasma triglycerides were 36% higher and plasma high density lipoprotein cholesterol concentrations were 9% lower on the high sugar diet. These findings indicate that over a six week period refined sugar in normally consumed amounts does not adversely affect the lipid composition of bile.
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