Nutra sweet is:
Saccharin.
Aspartame.
Xylitol.
Sorbitol.
Saccharin and aspartame are two artificial sweeteners commonly available. Saccharin is 100 times sweeter than sucrose and contains no calories.
Aspartame, commonly known as nutra sweet, is a combination of the aminoacids, aspartic acid and phenylalanine. It is 200 times more sweeter than sucrose.