Bismuth: An optional adjunct remedy in the treatment of H. Pylori is Bismuth, which is also part of OTC products such as Pepto-Bismol. Bismuth and lithium levels routinely test below normal with low stomach acid levels, respectively to upper stomach involvement, and lower stomach duodenal involvement. The magnesium present in some bismuth-containing products generally worsens low acid levels with long-term use, while any aluminum that may be present in these same products may cause constipation... Full Text