Chain that sells supplements

• Big initials in nutritional supplements
• Pill peddlers
• Vitamin retailer
• Big name in vitamins
• Vitamin and supplement retailer
• Vitamins and minerals shop
• Protein powder provider
• Big purveyor of vitamin supplements
• Health products retailer, initially

Wikipedia Word definitions in Wikipedia
GNC Holdings Inc. is a Pittsburgh, Pennsylvania -based American commercial enterprise focused on the retail sale of health and nutrition related products, including vitamins , supplements , minerals, herbs, sports nutrition , diet, and energy products.