If it pays to stop working, people will.

ECONOMIST: Forever young

So I think the fact that the formula is not so great, meaning it doesn't work every week and every year, is good because if it didn't, it would stop working.

FORBES: Intelligent Investing

"If requested to do so, we can completely stop it from working on a country-wide level, " says Graham Butler, Bitek's chief executive.

WSJ: Mideast Uses Western Tools to Battle the Skype Rebellion

"The working idea is that if we can detect it before it's clinically expressed and stop it then, we can prevent people from developing the disease, " Stern said.

CNN: Less-stressed people may have lower dementia risk