Two kinds of bones to make soup is needed.
Start out with equal amounts of marrowbones and soup (knuckle) bones. I use approximately two pounds of each, basically because that’s how Paidom sells them and it works well that way.(http://www.paidom.com/)

Both types of bones are needed. Marrow is where the body stores stem cells and converts them to blood cells or releases them in circulation to repair damaged tissues. It is an area of the body where all the nutrients needed to sustain life are concentrated. Soup bones are usually knucklebones or other bones containing cartilage. Cartilage converts to gelatin. It is a rich source of amino acids, like glycine, that enhance the body’s detoxification ability by stimulating production of glutathione. Cartilage is also a source of chondroitin sulfate that helps heal arthritic joints.

Both types of bones are rich sources of minerals, and I am not speaking of just calcium, but also magnesium, phosphorus, silicon, sulfur and trace minerals, all of which play essential roles in health.

Wash the bones in running water; then place the knuckle and marrow bones in a large pot with 1/2 cup vinegar and cover with clean, filtered water. The vinegar will evaporate completely and so it is safe even for small children. The vinegar creates an acidic environment that helps to draw the minerals out of the bones. Meanwhile, place the meatier bones in a roasting pan and brown at 350 degrees (about 15 minutes). Add the browned bones to the pot (along with any fat that is left in the pan) along with about 3 chopped onions, 3 chopped carrots and 3 chopped celery sticks. It is important not to overdo it on the vegetables as that can lead to a very bitter finished product! Add additional water if needed, but be sure to leave room at the top of the pot (about 1 inch) for the stock to expand.

Bring to a boil, and then remove any scum that comes to the top with a spoon. Reduce the heat to a low simmer, add about 1 tsp ground green peppercorns and thyme (optional), cover the pot tightly, and allow it to simmer for a minimum of 24 hours (36 hours is better but not necessary). I know it’s a long time but once you get it to the right heat it requires very little supervision. Just before finishing, add one bunch of parsley and simmer for 10 more minutes. Parsley adds additional nutrients and will help to alkalize your stock. At this point you will remove all the bones and vegetables, strain, and refrigerate. Once it is chilled you can skim off the fat, place in separate containers and refrigerate for up to a week, or freeze indefinitely. You’ll lose about a quart to evaporation.

I recommend drinking a cup a day for adults or children, and proportionately less for toddlers or babies. If your child doesn’t like it, try to find creative solutions to get him or her to drink it. Some parents have added it to juice or sweetened it with stevia and turned it into a sweet chilled drink!

Here is a partial listing of conditions that broth benefits:
Aging skin, allergies, anemia, anxiety, asthma, atherosclerosis, attention deficit, poor digestion, brittle nails, Celiac Disease, colic, constipation, dental degeneration, depression, diabetes, diarrhea, fatigue, food sensitivities, fractures, gastritis, heart conditions, high cholesterol, hyperactivity, high blood pressure, hypoglycemia, low immunity, inflammation, Inflammatory Bowel Disease, insomnia, reflux, Irritable Bowel Syndrome, memory loss, muscle cramps or spasms, muscle wasting, osteoporosis, Rheumatoid Arthritis, seizures, weight loss due to illness, wound healing, and more!