Men's Metabolism Comprehensive Multivitamin: GNC Mega Men Energy & Metabolism Multivitamin contains key nutrients for men's health , calorie burning and mental activity as well as antioxidants. Contains a Clinically Researched Men's Multivitamin Blend which works better than a basic multivitamin. GNC Mega Men Energy & Metabolism Multivitamin contains components supporting prostate health, vitamins necessary for energy production thermogenic components that promote calorie burning and antioxidants which help fight free radicals formed during intense training. Since 1935, GNC has been committed to meeting the highest quality standards , safety and effectiveness while applying the latest advances in nutritional science so that you can live well. Contains a combination of thermogenic ingredients helping to burn calories and increase mental acuity antioxidants.