The best replacement for aspartame is stevia.

The best alternatives to aspartame are rated as following:
★★★★★  stevia
★★★★★  sugar
★★★★  splenda
★★★★  sucralose
★★★  saccharin
★  nutrasweet
★  sucrose
★  phenylalanine
★  sorbitol
★  acesulfame potassium
★  xylitol
★  corn syrup
★  sugar which is better
  aspartate
  high fructose corn syrup
  sugar which is worse
  truvia
  msg
  neotame
  fructose
  erythritol
  acesulfame
  natural sugar
  saccharine
  sugar better
  sweet n low
  aspartame
  cyclamate
  aspartic acid

Your alternative for aspartame is not listed? Suggest!
Speaking about aspartame, one probably shouldn't forget about phenylalanine.

Other search terms related to aspartame and their ratings are:
★★★★★ phenylalanine
★★★★ caffeine
dextrose
You have in mind a companion for aspartame and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of aspartame in all years. Click on graph for more.
aspartame
stevia
sugar