Let's start with the obvious question - what is a supertaster? It sounds like a superpower! A supertaster is someone born with genes that code for larger numbers of small test buds on their tongue and are more sensitive to bitter flavors and to all other taste sensations. Essentailly they are tasting foods with a greater intensity. Supertasters often say that foods like broccoli, cabbage, spinach, grapefruit and coffee taste very bitter to them. Some supertasters are more 'picky eaters'.
Scientific American published a great article, which I have listed below for you, about how to put your taste buds to the test. Here is a simplified version for you:
Materials •Paper-hole reinforcers - or clean wax paper, a standard hole puncher and scissors (instructions below) •Water and soap
•Mirror •Blue food coloring •One glass of water •Magnifying glass •A bright light or flashlight
Preparation •If you do not have paper-hole reinforcers, wash your hands with soap, take a clean piece of wax paper, and punch one hole in it for each volunteer. Cut out each hole so that you have at least five, small wax paper "rings."
Procedure •Wash your hands thoroughly with soap. •Place a drop of blue food coloring on the tip of your tongue. Do not let the tip of the food coloring tube touch your tongue. •Take a mouthful of water, swish it around in your mouth, and then spit it out. •Make your tongue relatively dry by swallowing a couple of times. The remaining dye should stain all of the tongue blue except for the fungiform papillae, which will look like relatively large, lighter blue or pink bumps (in a sea of dark blue). These papillae are where the taste buds are. •Put a wax paper ring (that you prepared) or a paper-hole reinforcer on the tip of your tongue, in the area that has been dyed. •Using a magnifying glass under bright light, look in a mirror and count the number of papillae within the hole. How many papillae are within the hole? Tip: Don't count the really tiny bumps – just count the larger ones. •If you have more than 30 papillae you are considered a supertaster!