The company said it knows anecdotally that chewing gum offers a "stimulating effect" that aids concentration.

WSJ: Wrigley, Other Gum Makers Seek to Stimulate Gum Sales

But this actually had a stimulating effect on the adoption and development of technology in the longer run.

FORBES: What Are Examples of Things in the "Common Knowledge" about History That Historians Almost Universally Consider Incorrect?

For most, coffee has a stimulating effect due to its high caffeine content.

FORBES: Coffee Basics for Aliens

But high prices have had an effect, restraining demand and stimulating supply.

ECONOMIST: America��s economy is once again reinventing itself

PT141 is a copy of a hormone which has an effect on the nervous system called alpha-melanocyte-stimulating hormone.

BBC: Love rats point to female sex drug