In a spirit of enquiry(but mainly because it was cheap)I bought a carton of Cawstons Beetroot juice from our local"careless with money" outlet(Sainsburys).Very nice too.as it should have been at 10x thecost of homemade,which even I can manage.I did get a nice carton though.and the makers are concerned for my welfare,which is nice.I happen to like the stuff however Im inclined to think Im unlikely to benefit too much as regards my cycling.I dont thimk Im anywhere like good enough to notice!