Just like BPI did when they teamed up with GNC for fan input on the next Pump-HD flavor. Optimum Nutrition have jumped on board with the major supplement retailer to find out which one of green apple, strawberry lime, and pineapple, would customers rather see for AmiN.O. Energy. Since it’s debut the amino formula has received two flavors taking it’s menu total to five, two alternate sizes with a 10 and 65 serving bottle, and spawned two spin offs in AmiN.O. Chewables, and AmiN.O. Energy Chewables. The latest update will see one of the three working flavors go to the 30 serving option, and if it wasn’t obvious by the aligning of Optimum Nutrition. Either green apple, strawberry lime, or pineapple will be exclusive to GNC.