When you have a major endurance event & need extra power to keep going. The first sports gel to contain naturally occurring nitrates. Top athletes know that nitrates increase nitric oxide (NO) in your body which helps to deliver oxygen & nutrients more efficiently. This means you can sustain higher levels of power for longer before fatigue sets in giving you extra power for those extra tough events. You need to start taking 3 days before an event, 2 to 3 times a day for maximum effect.