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.
Both birth control pills and the Depo-Provera shot are very safe for most women to use. As with any medicine, they can still cause unwanted side effects. For birth control pills, side effects can include: breakthrough bleeding, or bleeding during active pill days.