1 Required for building and repair of body tissues (including muscle) 2  Enzymes, hormones, and many immune molecules are proteins.  Essential body processes such as water balancing, nutrient transport, and muscle contractions require protein to function.
Previous Game. Player Profile. A much-vaunted prodigy when snapped up by Manchester United from Sporting Lisbon in 2003, Ronaldo is now, alongside Lionel Messi, the best-known player on the planet, and a hero for Real Madrid and Portugal.
Ronaldo's performances saw him crowned the 2008 FIFA World Player of the Year and that summer, Real Madrid -- Ronaldo's boyhood club -- came calling. Ferguson refused to part with his star man, insisting he would not sell that club a virus, such was his unhappiness with the way they pursued Ronaldo.