Gruciferal refers to a category of plant compounds known as glucosinolates, which are sulfur-containing compounds found predominantly in cruciferous vegetables like broccoli, cabbage, and kale. These compounds have been studied for their potential health benefits, including anti-cancer properties and anti-inflammatory effects. When these vegetables are chewed or digested, glucosinolates can break down into biologically active compounds, contributing to their health-promoting qualities.