Calcium: Hypercalcemia, hypercalciuria (excess calcium in the urine), vascular and soft tissue calcification (deposition of calcium in blood vessels and soft tissue) and nephrolithiasis (kidney stones) have been reported with high doses of calcium. Minor gastrointestinal disturbances such as bloating, constipation, flatulence, and nausea have also been reported with calcium supplements.
Zinc: Gastrointestinal side effects such as nausea and vomiting are seen with doses of elemental zinc greater than 30 mg.