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 began his senior club career playing for Sporting CP, before signing with Manchester United at age 18 in 2003. After winning his first trophy, the FA Cup, during his first season in England, he helped United win three successive Premier League titles, a UEFA Champions League title, and a FIFA Club World Cup.