The FDA approves these artificial sweeteners for use in food:

Acesulfame potassium, or ace K (brand names, Sunnett, Sweet One): this calorie-free sweetener is two hundred times sweeter than sugar.  Even though ace K has been approved by the FDA since 1988 no further testing has been required even though studies have indicated that it may cause cancer in animals.

Aspartame (Equal, NutraSweet): aspartame has become known for producing a wide variety of symptoms related mostly to the nervous system, such as headaches, dizziness, mood changes, convulsions, and memory loss.  Before your body can eliminate aspartame, it converts to formaldehyde (which is a carcinogen and used for embalming dead bodies).  Found in more than five thousand products, this artificial ingredient has been the source of more complaints to the FDA than any other food additive.

Neotame: Up to thirteen thousand times sweeter than white sugar, it is similar to aspartame in composition but without an amino acid called phenylalanine; nonetheless, long-term health studies have not been conducted to ensure its safety.

Saccarin (Sweet’N Low): The first commercial artificial sweetener, saccharin has been proven to cause cancer in animals and is a suspected human carcinogen.  

Sucralose (Splenda): Sucralose is six hundred times sweeter than sugar and has been tied to numerous adverse effects.

Although they are all FDA approved, these sweeteners are not without safety risks and are best avoided.