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    Vitamin D Causing Constipation

    Thanks. Found some studies showing it increases brain serotonin but decreases gut serotonin. Does this just mean I am abnormally low in serotonin to begin with? I guess so, as I have been prone to slow motility for most of my life. Any tips on how I can improve my serotonin status?
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    Vitamin D Causing Constipation

    At least two dozen different brands, anywhere from 500 to 10k IUs, tried many different times, with and without food.
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    Vitamin D Causing Constipation

    Everytime I try any dose of vitamin D I become horribly constipated fr several days after stopping it. Has anyone else experience this problem, or does anyone know what it could be from. Nothing seems to help clear up the problem, not increasing water, fiber, magnesium, etc. I have seen other...
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