September 26/New York/Fox News -- Biting into a lemon has never tasted so sweet. New research reveals the secret ingredient of a little red "miracle fruit," which turns sour into sweet. The results will not just make for sweet lemons, but it could lead to more believable non-sugar sweeteners.
The researchers found that this little berry contains a special protein, called miraculin, which attaches to sweet-sensing taste buds. It seems to hold on tighter to these receptors when there are acids, which give foods a sour taste, in the mouth as well.