12 Reasons You're Miserably Constipated - Constipation Relief

Certain multivitamins

Vitamins with high levels of calcium and iron can be extremely constipating, Dr. Iqbal says, and yet many people don’t realize this and take one every day. “Certain minerals, especially in amounts over the recommended daily dosing, can slow down digestion in the large bowel,” he explains. Unless your doctor tells you otherwise, there’s likely no need to take a multivitamin every day.