The ancient Maya processed their corn by boiling it with snail shells or with white lime. The process, known today as nixtamalization, made the corn's niacin available.
Depo-Provera can cause irregular bleeding and other side effects. Irregular bleeding The most common side effect of the birth control shot is irregular bleeding.
Gastrointestinal side effects have included nausea and dyspepsia in 2% of patients. Heartburn, anorexia, vomiting, flatulence, cramps and diarrhea have also been observed. Rare cases of pill-induced esophagitis and pseudomembranous colitis have been associated with the use of rifampin.