<qa>  What is the dose of resveratrol?In this pilot clinical trial, boxers n30 will be consented to participate in this study prior to engaging in a boxing match. The concussion history will be collected before enrolling. Baseline cognitive testing and magnetic resonance imaging MRI scan will be performed to obtain both structural and functional data. Only 12 boxers that have a concussion will be enrolled in this study. After participating in the boxing match, if the boxer has been diagnosed with having a concussion by the ringside physician, the boxers will be treated with an oral dose of the active trans-resveratrol 500 mg or placebo within 2 hours of completion of the boxing match. The boxer will be treated with either resveratrol or placebo depending on the randomization schedule once a day for 30 days. Cognitive testing and MRI scans will be conducted on day 7 after the concussion. 