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.
Cristiano Ronaldo, however, was playing for one of the worldâs most renowned teams in his late teens. Signed to Manchester United in 2003, he became the clubâs first player from Portugal, boasting an incredible Â£15-million agreement in his late teens.