Quick Answer. Pepto-Bismol sometimes turns stool black when its active ingredient, bismuth subsalicylate, reacts with sulfur in the intestinal tract to form bismuth sulfide. The change in stool color caused by Pepto-Bismol isn't harmful, but a doctor should be consulted if it is accompanied by vomiting, diarrhea or stomach pain, states About.com.
Folate is the natural source of vitamin B9 found in a variety of foods, most often, in leafy green vegetables, dried beans, and peas. When it is used as an additive in foods, generally in bread, grains or breakfast cereal, or when it is taken as a supplement, it is called folic acid.eans and peas are good sources of folate. Pregnant women are advised to take folic acid supplements to reduce the risk of birth defects. Curly endive, which contains folate. Folate supplements are water-soluble.
Folate has also been shown to work together with vitamin B6 and vitamin B12 to decrease the risk of heart attack, stroke or loss of circulation in the hands and feet. Food sources include liver, yeast extract, citrus juices and fruits, beans, nuts, seeds, liver, dark green leafy vegetables.