Summary
Experiments in the rhesus monkey give no support to the assumption of a synergistic influence of Vitamin B1 upon laxative action. Daily doses from 1.0 to 100 mg./kg. thiamine hydrochloride, orally administered over periods of 2 to 17 days, did not significantly increase the effectiveness of a laxative (Phenolphthalein). The average increase in effectiveness in 25 experiments was 18 per cent with a variation of ± 17 per cent.
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Loewe, S., Loewe, I. & Knox, R. Thiamine influence upon laxative action. Jour. D. D. 10, 65–66 (1943). https://doi.org/10.1007/BF02996915
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DOI: https://doi.org/10.1007/BF02996915