GNC Mega Men Sport Multivitamin for Men, 90 Count, for Performance, Muscle Function, and General Health, COMPREHENSIVE MEN’S SPORT MULTIVITAMIN: GNC Mega Men Sport Multivitamin provides key nutrients for men’s health, performance, muscle function and immune health, plus antioxidants., CLINICALLY STUDIED MULTIVITAMIN BLEND: Contains a clinically studied multivitamin blend for men shown to work better than a basic multivitamin.^, PACKED WITH KEY NUTRIENTS: GNC Mega Men Sport Multivitamin contains beta-alanine, which is a buffering precursor to carnosine?a key muscle function and performance factor. It also provides branched chain amino acids (BCAA) and antioxidants, which help fight free radicals that can be produced during intense exercise., BACKED BY SCIENCE: Since 1935, GNC has been committed to meeting the highest standards of quality, safety and efficacy while applying the most up-to-date advances in nutritional science so you can live well., Performance Features beta-alanine, a high-efficiency muscle pH buffer, and carnitine, which helps use fatty acids as energy.*,