Optimum Nutrition Amino Energy – Pre Workout with Green Tea, BCAA, Amino Acids, Keto Friendly, Green Coffee Extract, Energy Powder – Concord Grape, 30 Servings

Customers find this pre-workout supplement effective, noting it keeps them going through their workouts and provides clean energy without jitters. They appreciate its taste, particularly the grape flavor, and consider it good value for money. The product contains a good source of amino acids, and while some customers report no stomach issues, others experience nausea.