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Calcium and Psyllium Husk have at most a minor documented interaction. No separation is needed at usual psyllium doses. With very large fibre doses, or while a calcium deficiency is being treated, taking them at different times is a pragmatic precaution, though no study has tested whether it helps.
In a small human trial, 3.4 g of psyllium taken with calcium made no significant difference to calcium absorption. That one trial does not show the effect, or its absence, at larger fibre doses.
Viscous fibre can slow mineral absorption in the gut. In rats, intact psyllium lowered calcium, magnesium and zinc absorption.
What to do: No separation is needed at usual psyllium doses. With very large fibre doses, or while a calcium deficiency is being treated, taking them at different times is a pragmatic precaution, though no study has tested whether it helps.
This information is for educational purposes only. It is not a substitute for professional medical advice. Always consult a qualified healthcare provider before starting, stopping, or changing any supplement or medication.