That movie is expected to arrive in fall 2015, but in the meantime, we're celebrating Christmas Vacation.. In honor of the holiday classic's 25th anniversary, we're catching up with where the cast is now in the gallery above.
It turns out that the active ingredient in Pepto-Bismol (bismuth subsalicylate) contains a chemical called bismuth. When a small amount of bismuth combines with trace amounts of sulfur, a black-colored substance (bismuth sulfide) is formed.
A small amount of a substance called sulfur is present in saliva and the gastrointestinal tract. Sulfur interacts with bismuth, the active ingredient in Pepto-Bismol. The result is a new substance called bismuth sulfide, which causes the stool to turn black.