Calcium ascorbate is a combination of calcium and vitamin C in a single supplement. The presence of calcium lowers the acidity level of vitamin C, so it is less possibly to trigger digestive side effects than the other forms of vitamin C supplements. Nevertheless, this does not mean that these supplements are free from potential side effects. A doctor should be consulted to ensure that it is safe to use the supplement.
Minor side effects
Even though not all suffer from the effects with vitamin C supplements, these can manifest particularly if large doses are taken.
The supplemental vitamin C oftentimes causes heartburn, headache, stomach cramps, nausea, gas, vomiting or diarrhea. If the individual has diabetes, large doses of vitamin C can cause the blood sugar to rise.
Since calcium is present, it can also cause gas, bloating, constipation and acid rebound in some individuals. Lowering the amount of calcium ascorbate taken daily can lessen or eliminate any side effects.
Possible drug interactions
It is important to note that vitamin C supplements might interact with protease inhibitors, statins, blood thinners, chemotherapy, estrogens, niacin, fluphenazine, aluminum from antacids, aspirin and acetaminophen. It makes these drugs less effective or increase the risk for side effects.
Calcium might also interact with ceftriaxone, certain forms of antibiotics, thyroid medications, diuretics and some heart medications.
Risk for toxicity
Using more than 2,000 mg of vitamin C can lead to diarrhea and heighten the risk for kidney stones. Do not exceed the tolerable upper consumption for calcium which is 2,500 mg per day.
Large amounts of calcium can lead the body to take in less zinc and iron and can even lead to kidney issues, constipation and calcification of the organs.