What nutrient is required by the body in order to build up muscles?

More Questions:

Someone who is called a "flash in the pan" could also be described as what?

What would be scored by the Apgar score?

What US city was the first Starbucks store opened in?

How many tiles does a player play to score a bingo in Scrabble?

What four evangelists wrote the Gospels?

The Rio Grande River flows in what body of water?

What do scatologists study?

A male duck is properly known as what?

In what US town does the movie "Groundhog Day" take place?

Who plays Jen Lindley on the TV show "Dawson's creek"?

What alien comes from the planet Melmac?

In his 2006 movie, what "glorious nation" does Borat hail from?

Who played Mr. Brown in the movie "Reservoir Dogs"?

Whose vice president was Nelson A. Rockefeller?

Who commanded the American forces in Vietnam until 1968?