Anyone have any experience with this product.  A few studies I seen that indicate its properties as a pain reliever?  Apparently, it also has trace elements of melatonin.  Thus, an evening drink of this might be a nice touch before turning in after a day of hard paddling.  It (two table spoons) makes a fairly descent drink mixed with an amble class of water, although some might wish to cut the tartness with a little sweetner. (Of course, I'd probably dehydrate the concentrate to a fruit leather that I'd have to re-constitute.) 

dd