Build Bigger Muscles and Better Workouts wth B Vitamins Sport and exercise are important. But strenuous exercise can damage and even injure your muscles. Muscle regeneration can be a slow process. New research is suggesting that a duo of B vitamins can speed it up. After muscle damage, muscle regeneration is driven by muscle stem cells. A just published double-blind, placebo-controlled study asked 39 men with an average age of 26.7 years to do a single session of damaging high intensity