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- W3211034721 abstract "Uncontrolled observations implicate sulfate in drinking water at concentrations exceeding 500-700 mg/liter as a cause of diarrhea, but controlled studies have not been reported. We conducted a controlled study in normal adults to determine the effect of various drinking water sodium sulfate concentrations on bowel function. Ten healthy subjects were given a constant diet and fluid intake. Fluid consisted of 36 ml/kg/day of drinking water of various known sulfate concentrations and 500 ml of other fluid. In a dose-ranging study, four subjects received drinking water with sulfate concentrations of 0, 400, 600, 800, 1000, and 1200 mg/liters for six consecutive two-day periods. In a single-dose study, six other subjects received water with sulfate concentrations of 0 and 1200 mg/liter for two consecutive six-day periods. Stool mass, frequency, and consistency and mouth-to-anus appearance time of colored markers were measured. In the dose-ranging study, the only significant linear trend was decreasing mouth-to-anus appearance time with increasing sulfate concentrations. In the single-dose study, 1200 mg/liter sulfate caused a significant but clinically mild increase in mean stool mass per six-day pool from 621 g to 922 g (P = 0.03). When all 10 subjects were used to compare effects of 0 mg/liter and 1200 mg/liter sulfate, significant differences in stool consistency (P = 0.02) and transit time (P = 0.03) were observed. None of the subjects reported diarrhea or passed more than three stools per day. In 10 normal adult subjects, sulfate in drinking water at a concentration of 1200 mg/liter, which is higher than reported to occur in US municipal water sources, caused a measurable but clinically insignificant increase in stool mass and decrease in stool consistency and appearance time, but no change in stool frequency and no complaint of diarrhea." @default.
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- W3211034721 date "1994-01-20" @default.
- W3211034721 modified "2023-10-17" @default.
- W3211034721 title "Intestinal effects of sulfate in drinking water on normal human subjects" @default.
- W3211034721 hasPublicationYear "1994" @default.
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