Can You Take Calcium and Rubidium Together?

May affect absorption

The short answer

Rubidium and calcium may compete for absorption in the GI tract. As monovalent and divalent cations respectively, they can interfere with each other's uptake through shared cation transport channels.

How to arrange timing

Separate rubidium and calcium supplements by at least 1 hour.

Reference

Reference noted for this combination: Nielsen FH. Ultratrace minerals. In: Shils ME, et al., eds. Modern Nutrition in Health and Disease. 10th ed. Lippincott Williams & Wilkins, 2006.

Important context

Whether supplements suit you together also depends on dose, product formulation, health conditions, and medication use. Ask a doctor or pharmacist first if you take medication, are pregnant or breastfeeding, or have a chronic condition.