For the Pork JUICE I recommend 1 part concentrate to 2 parts fruit juice. I usually mix mine up with straight apple juice and sometimes I add peach or white grape depending on my mood...lol, but always at least one part of apple. I will say you have to be careful when adding a higher acidic juice like pineapple or orange not to put too much in because it will breakdown the meat fibers and make the texture a little weird. That also depends on how long you let the meat rest after injecting before it goes on the cooker. 1 bottle of Pork JUICE mixed at these ratios will be enough for 4-5 butts depending on size.
For the beef JUICE, I recommend 1 part concentrate to 4 parts liquid of your choice. I use 1 part concentrate to 2 parts water, 1 part apple juice, and 1 part peach nectar...now everyone knows what I mix it with...lol. I try to stay away from beef broth because they are all different, the concentrate has plenty of beef favor...IMO. 1 bottle will do 4 briskets depending on the size, I use about 4 ounce of concentrate for a 15-16 lb brisket.