EnergySource 4:1 is an advanced fuel for use by endurance athletes. It?s Europe?s first state-of-the-art carbohydrate-protein energy and hydration drink - for use DURING exercise. It contains 4 Parts carbohydrate to 1 Part whey protein, hence the name. Research shows that this critical ratio, when used during exercise, provides athletes with more energy than carbohydrate alone. Based on the Award Winning complex carbohydrate found in standard EnergySource, 4:1 is easy on the stomach, hypotonic and refreshing. Performance proven in the toughest races, 4:1 also contains a unique H E A C (high electrolyte anti cramp) formulation. This is designed to maximize fluid absorption in and minimize cramp. 
Available in Fresh Citrus and Summer Fruit flavours. Now with Super Carbs!