KEANA Nadeshiko Baking Soda Smooth Toothpaste Made in Japan. The power of baking soda removes yellowing that bothers you! A smooth toothpaste made from 100% natural ingredients. Tighten gums with refreshing mint and natural salt. With the power of baking soda (sodium bicarbonate: cleaning agent), you can turn off the yellowing caused by tar on your teeth. Baking soda’s proteolytic power and a soft scrubbing effect that won’t damage your teeth removes yellowed spots and leaves them clean and white! Since it is meant to be put in your mouth, it is made with only natural ingredients. 100% plant-based. Tightens gums! Contains natural salt. Refreshing natural scent of peppermint essential oil. No synthetic surfactants, abrasives, or synthetic fragrances are used.