No, the bone spurs are not caused by taking too much Calcium and/or Vitamin D. Bone spurs in the spine are formed as a reaction to the aging process that begins with the bulging of the spinal discs. As the disc bulges out, the bone is pulled with it, creating the classic hook-like structure called a spur. Spurs are just part of the natural aging process of the spine.
Additionally, others have asked whether or not Calcium-plaques and "hardening of the arteries" are cause by taking calcium supplements. The answer to that question is NO as well. The process of plaque formation in the blood vessels is triggered by inflammation. Inflammation leads to the deposition of calcium much the same way it does in tendons which are chronically inflammed. Calcific tendonitis is not caused by too much calcium either.
What does too much Calicium cause?
According to the Office of Dietary Supplements:
Excessively high levels of calcium in the blood known as hypercalcemia can cause renal insufficiency, vascular and soft tissue calcification, hypercalciuria (high levels of calcium in the urine) and kidney stones. However, hypercalcemia rarely results from dietary or supplemental calcium intake; it is most commonly associated with primary hyperparathyroidism or malignancy.
Thank you for your important question that is probably on other people's minds as well.
Dr. Christina Lasich, MD