I took "calcium carbonate" for years and always had a problem with constipation. My doctor at the time did not know that some types of calcium cause this problem. When I was told by my new doctor what could be causing it, I switched to "calcium phosphate" gummies. The constipation was gone within the week. Sometimes it baffles me what some doctors don't know.

I know how you feel. One medication seems to cause something else, here, take another pill. I took away my calcium and magnesium which I substitute with lots of veggies 🌽. No more constipation. Hugs. Barb

Hi RitaMaria, regular calcium affect your heart , kidneys so, I take Naturello BoneStrength plant calcium complex, switching sometimes to Mykind Organics Plant calcium, both of them at Amazon. They also contain D3,K2,Mk-7 magnesium , etc. No side effects. Both less than $ 30. Vegan calcium is safer. Remember to do excercise en do weights to help build bone. Good luck.

If you go to the good websites, they will tell you that calcium carbonate does cause constipation. Several other types of calcium do not.

I was told to take calcium citrate, as it is absorbed best