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 may have been kept at bay by Kolo Toure and Co on Tuesday night as he attempted to chase down Raul's Champions League goalscoring record, but Sportsmail can reveal the Real Madrid forward's secret to remaining the bigger man.