article_snippet.sent: He not only returned to He normal weight - but He then put on another 15 pounds of pure muscle to play the desperate fighter Billy Hope.
article_snippet.sent: Claybon explained to Yahoo that Jake put back on the weight Jake had lost before gaining an extra 15 pounds of muscle for Southpaw.
article_snippet.sent: Health experts told the Daily Telegraph that Gyllenhaal likely went on a high-protein diet, that likely included protein powder.
article_snippet.sent: Jake likely had to consume 130 grams of protein - two and a half times the daily recommended intake.
article_snippet.sent: Health experts also told the Daily Telegraph  that such drastic body changes could cause long-term damage to Jake body.