I used Myron Mixon's Hog Injection from his Book "Smokin with Myron Mixon" Hog Injection 4 Quarts Apple Juice 1 Quart Distilled White Vinegar 5 Pounds Sugar 2 Cups Salt 1 Cup Monosodium Glutamate such as Ac'cent.
In a large stockpot, combine the apple juice and vinegar over medium heat. Stirring continuously, pour in sugar, salt and monosodium glutamate. Stir until seasonings ar completely dissolved. Do not boil. Remove from eat. If reserving for later use, let the liquid cool; then pour it into a large bottle or container. Store refrigerated for up to 1 year.