The household item turning runners into world record holders (nbcnews.com)

Mourten bicarb it was, not the carbon blades. They found a way to bypass vomiting and diarrhea.

"Maurten, the Swedish company, has found a way to encase small tablets of bicarbonate into a gooey, soup-like hydrogel that guides them through the stomach and into the intestine, where the bicarbonate is dissolved and absorbed with less potential nausea, vomiting or diarrhea, according to the company."

Not exactly a household item.