Stephen Is Underweight and Has Been Advised by a Weight-Lifting

Stephen is underweight and has been advised by a weight-lifting friend to take chromium supplements to help him increase muscle mass. Based on the most recent research findings, what would a dietitian most likely advise Stephen about the supplement's effectiveness?

A) No research has been carried out to assess the effectiveness of chromium supplements.
B) Chromium supplements increase metabolism and reduce body fat and muscle mass.
C) Chromium supplements have no effect on muscle mass.
D) Chromium supplements increase muscle mass only for athletes in top physical shape.