I've started the difficult task of planning the supplementary nutritional intake I'll need when running from John O'Groats to Land End. Fortunately, there are a whole host of products out there to choose from. However, after months of experimentation, the ones I trust to be the most effective are from SIS (Science in Sport). Their products are for use before, during and after exercise. They even do a night time drink for athletes. Yummy!
