Diet food causes weight gain?

Artificial sweeteners in diet foods may block the body's natural ability to know when it is full. Rats fed artificially sweetend foods gained more weight (here). It seems that the rats fed sacharin also expend fewer calories when they exercised (here).

COMMENT: A study released last week showed drinking diet sodas greatly increase your risk of getting diabetes or heart disease. Other studies have suggested a link between the chemical aspartame in Nutrasweet and neurological symptoms (here).