Why Orange Juice Tastes Disgusting After You Brush Your Teeth

Finally, an answer.

OJ
Jeremy Keith via Flickr CC By 2.0

In a handy video, the American Chemical Society has explained why orange juice (and food in general) tastes like soap after you brush your teeth. The basic gist is that a detergent called sodium lauryl sulfate, found within your toothpaste, blocks the sweet receptors on your tongue and ramps up your bitterness receptors. The ACS has a more detailed explanation below:

Next, hopefully they'll tackle the question of why toothpaste makes water taste extra cold. (...Or is that just me?)

Other gustatory questions you can chew on: