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.
On September 15 of 2013, Cristiano Ronaldo signed a new contract with Real Madrid, which will link him with the club until 2018. The deal extended his previous 2009 contract for 3 more years, since it was set to expire on 2015.