Toothpaste, white vinegar, and baking soda are not regular whitening products and should not be used for whitening. The main ingredients of toothpaste include friction agents, moisturizers, thickeners, surfactants, etc. It usually does not contain whitening ingredients. The friction agent in it is used on facial skin and can also cause damage to the stratum corneum. The main ingredient of white vinegar is acetic acid, which is corrosive and can lead to redness, dryness, peeling and other undesirable irritations when used directly on the skin. The main component of baking soda is sodium bicarbonate, which is weakly alkaline and can disrupt the pH balance of the skin, leading to dry skin. Stinging, redness and swelling can also occur in people with sensitive skin. Skin color depends on genetic, environmental and other factors, it is not recommended to use prescriptions for whitening, and those who have cosmetic requirements need to go to a regular hospital for medical treatment.