Vitamin D and Opioids both reduce Magnesium, which results in constipation
Opioid Induced Constipation and Magnesium Vitamin D Survivor Sept 2016
Constipation - Magnesium, Calcium and cofactors – Vitamin D Life is included below
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Members of my family noticed this as well.
My 103 year old father-in-law had lots of constipation after increasing vitamin D to 17,000 IU daily - cured by also increaseing his Magnesium intake
My 73 year-old wive had constipation when taking hydrocodone untill we increase her Magnesium intake