如果你的牙齿不白是因为烟渍茶渍等食物长期造成的,那就一定有效。如果是你本身的牙齿颜色,那就没用。 说小苏打有腐蚀作用的,都是网上道听途说,不真实。 欧美人有用食用小苏打粉刷牙美白的老传统,我上了相关网页看他们的回答,他们用家庭老年人一辈子用苏打粉刷牙的经验告诉我们,没用任何害处。有个人说他的爷爷奶奶都是习惯用小苏打刷牙,有时候甚至直接用手指头蘸小苏打擦牙,到90岁去世,牙齿一颗都没掉,好好的。这就是明证了。我把原回复贴给你:By Deeli 03/29/2010 Three of my grandparents brushed their teeth nearly their entire lives with a good old fashioned baking soda paste made with water. One never used a toothbrush but rather his finger. Two passed away in their 70's and the other passed away in her 90's. All passed away with no enamel or tooth decay and all still had all of their teeth.
Too vigorous brushing or too hard of toothbrush bristles will cause much more damage than a baking soda paste.