There are many hard to believe theories on the cause of bone/heel spurs. After many years of hearing what works for different people, our conclusion on the matter is this:
Calcium is the most abundant mineral in the body but may also be the most deficient. The amount of calcium that we absorb from our food varies widely. Our age is one factor. An adolescent may absorb up to 75% of the calcium obtained from foods, while in adults the maximum absorption rate ranges from 20% to 30%.
Even though our bones feel solid and seem permanent they're just like any other body tissue - they're constantly being broken down and formed again. In an adult, 20 percent of bone calcium is withdrawn from bones and replaced each year. Thus, every five years the bones are renewed.
Calcium is found in the extra cellular fluids and soft tissues of the body where it is vital to normal cell functioning. Much of the calcium in soft tissues is concentrated in muscle, although it is contained in the membrane and cytoplasm of every cell.
When the body is deficient of calcium it begins to leach calcium from the bones. In many people this happens to be in the heel of the foot or some other weak area of the body. As the calcium is being leached, it forms an eruption (similar to a volcano). This eruption is the bone spur.
Many people that have suffered from bone spurs found relief when they properly supplemented their diet daily with "good" calcium. They found that providing their body with "good" calcium along with other vital minerals stopped the "leaching process" (calcium deficiency) thus allowing the bone spur to shrink down and eventually disappear. With the bone spur gone, the sorrounding damage from the spur is able to heal also.