A woman brushing her teeth with a purple toothbrush.

The video starts with a woman looking confused at a purple bottle, then brushing her teeth with a purple toothbrush. A man, identified as a dentist, appears and explains that purple shampoo is used to neutralize yellow tones in hair and questions if people think it would do the same for teeth. He shows images of purple shampoo being used on hair and then a color spectrum, explaining that purple and yellow are complementary colors. He then shows examples of misleading advertisements and fake research papers promoting teeth whitening products. The video ends with the man holding a product and warning against using it on teeth.