This coupon has expired $0.50 for Optimum Nutrition® Protein Cake Bites. Offer available at GNC, Vitamin Shoppe. expires on 09/02/18 Other coupons you may be interested in $1.00 for Jarritos (expiring on Monday, 01/02/2023). Offer available at multiple stores. $1.00 for Sangria Senorial (expiring on Monday, 01/02/2023). Offer available at multiple stores.