The vegetable known for its ability to stain clothes is beetroot, or simply beets. Beetroots contain a natural pigment called betalain, which is responsible for their deep purple color. When the juice from beets comes into contact with fabrics, it can leave stubborn stains that are difficult to remove, especially if not treated promptly. Due to their vibrant coloration, beets are often used in cooking and natural dyes. While the pigment is beneficial for health—being rich in vitamins and antioxidants—caution is advisable when handling beets to avoid unintentional stains on clothing.