Q. How long before a 5k should I drink Lucozade?
A The answer is that you don’t NEED Lucozade Sport for a 5k. You don’t need anything special before a 5k.
Personally I DO HAVE ONE half an h our before a race instead of breakfast. OR I would have a banana and water instead. These are purely to avoid running on an empty stomach which would make me personally feel or be sick – probably different for you.