Figure 3B shows the number of black stool movements reported in the ferrous sulphate group: no black stools were reported by participants in the placebo group.
One-hundred-and-forty consecutive pattendingthending the outpatient Gastroenterology clinic of the University Hospital of Heraklion for the first time and complaining of abdominal pain, discomfort or disturbed stool movements were invited to provide responses to the questionnaire.
The number of black stool movements on each day was compared using the one-way analysis of variance with the Bonferroni post-hoc test to correct for multiple comparisons.
For those participants taking ferrous sulphate there was a significant increase in the number of black stool movements from day 3 of the treatment period (p = 0.03) which only returned to baseline 3 days after stopping the ferrous sulphate tablets (i.e. day 10 of the study) (p = 0.005).
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Without knowing that you have to have a bowel movement, stool may stay in your intestine longer, becoming harder as more water is absorbed with time.
The symptoms included were bowel movement, stool consistency, discomfort, flatulence, abdominal pain, and bloating, and subjects were asked to score them on a scale from 1 (none, normal, good well-being) to 5 (severe symptoms and discomfort).
No significant changes occurred in fecal pH for any of the treatments and no significant detrimental effects were observed on bowel movement, stool consistency, or discomfort, indicating that RS at doses of 33 g per day are well tolerated in human subjects.
