Completely tore my left quad tendons, spent 3 weeks in a cast and 3 months in PT. I used a good beef protein(Olympian Labs) 2x per day, 3-4 servings of glutamine(Clinical Sports Labs) and 1 serving, 3,600mg, of BCAA's before bed(Clinical Sports Labs). Not saying it cured anything faster but my ortho surgeon was even shocked how quickly I rehabbed.
Good Luck