I normally buy beek knuckle or use a chicken carcass and boil it in a pot over the stove. I use garlic, onions, sea salt, pepper and vinegar. I normally boil it for 4-5 hours. I have also made broth overnight in a slow cooker, it just takes a little longer but both yield great results. The most important ingredient in my opinion would be the vinegar since it really pulls the nutrients out of the marrow and into the broth.
Oh and normally I only refrigerate for a week at the most but others may do it for longer.
"If man made it, don't eat it" - Jack Lallane
People say I am on a "crazy" diet. What is so crazy about eating veggies, fruits, seafood and organ meats? Just because I don't eat whole wheat and processed food doesn't make my diet "crazy". Maybe everyone else with a SAD are the "crazy" ones for putting that junk in their system.