PITTSBURGH, Aug. 29, 2012 /PRNewswire/ -- GNC Holdings, Inc. (NYSE: GNC), the nation's largest specialty retailer of health, wellness and sports nutrition products, and actor/producer Mark Wahlberg today announced that they are hosting a benefit concert in celebration of MARKED ™, a new line of performance nutrition products they developed in partnership. Rock band 3 Doors Down will headline the one-time only concert taking place in Pittsburgh, Pa on Thursday, September 20th at Stage AE. A portion of all ticket sales will be donated to support the Mark Wahlberg Youth Foundation, whose mission is to improve the quality of life for inner city youth, and the Pressley Ridge Foundation, which offers programs for troubled and developmentally challenged children. (Logo: http://photos.prnewswire.com/prnh/20110302/NE57701LOGO ) "MARKED is more than just a line of products. It's a brand that is built on the principle that everyone should enjoy a healthy and supportive lifestyle," said Mark Wahlberg. "Currently, a portion of all sales of MARKED products are donated to my Foundation, so this concert only emphasizes our dedication to supporting the health and wellness of the next generation." The MARKED line – consisting of seven sports and active nutrition products – provides the ultimate performance nutrition for anyone who wants to achieve their health and fitness goals. Every MARKED product has been rigorously tested for banned substances by HFLSports Science, a world-class sports anti-doping lab, and based on cutting edge nutritional science using only the highest quality ingredients. "Working with Mark Wahlberg and 3 Doors Down to raise money for two great organizations is a testament to our commitment to help people of all ages 'live well,'" said Joe Fortunato, GNC President and CEO. "We're thrilled to be able to offer this unique opportunity for our consumers to 'Get MARKED' with Mark Wahlberg and 3 Doors Down this September." In addition, ahead of the concert, on September 20th, Mark Wahlberg will participate in a webcast on MarkedNutrition.com with Men's Fitness Editor-in-Chief Michael De Medeiros to discuss the MARKED line and answer questions directly from fans. More details about how to join will be available at the website in September. GNC is also deploying street teams around Pittsburgh that same day to present exclusive product offers and help inspire consumers to "Get MARKED." "Mark has personally motivated me to get back on a healthy workout program and it's clear he takes 'living' well very seriously. Thanks to his inspiration and guidance, I'm exercising regularly and have already lost 50lbs." said Tom Dowd, EVP, Chief Merchandising Officer and General Manager.