High Stomach Acid is of equal concern since it will frequently result in calcium and or magnesium loss. However, by lowering acid levels, high calcium and or magnesium intake can have a significant impact on medical conditions that are already affected by abnormally low stomach acid levels. For instance, if infected with Helicobacter Pylori, the bacteria is always more active under low acid conditions, while long-term infections with H. Pylori, or salt-restricted diets can at times reduce stomach acid levels enough to affect or impair Vitamin B12 uptake. As a result, the best forms of calcium may be chosen based on an individual's tendency for low stomach acid or constipation, for which Calcium citrate is usually better suited, in contrast to a tendency for softer stools or high stomach acid, for which Calcium carbonate or Calcium oxide may be better choices... Full Text