Neotame (E961) is a super-sweet chemical that is similar to aspartame (Nutrasweet), only 10 times sweetener. Neotame is 7,000 to 15,000 times sweeter than sugar and retains its sweet flavor in juices and diet sodas for years longer than Nutrasweet. Unlike aspartame, it is safe for people who have phenylketonuria and it does not generate methanol when it is digested.
Neotame is approved for use in the US, EU, and most of the rest of the world, but very few food and beverage manufacturers are using it yet. When you see fruit and vegetable juices sweetened with Neotame, you don't have to worry that the chemical might be poisoning you—but it's not added unless natural flavors of fruit and vegetable juices can't come through.