SFuels PRIMED should be used at a dose of 2.5mg -  3mg of caffeine per kilogram of bodyweight in order to enhance fat oxidation. For example if you weigh 75kg, you would beed 187 – 225mg of caffeine (2 – 3 SFuels PRIMED Sachets) to trigger the effect. Typically this is applied to racing situations. The doses can be split with 1 sachet prior to the race and the 2nd / 3rd dose 60 – 90 minutes after race start.