As it turns out lots of backaches are due to a hidden osteomalacia. With low levels of taurine fine control of intracellular calcium homoestasis is lost. Calcium blood levels can be normal or just slightly low and one can still have a severe case of osteomalicia. Osteomalacia refers to a marked softening of the bones, most often caused by severe vitamin D deficiency. Severe vitamin D deficiencies can result in poor absorption of calcium which can lead to softening of the bones.
Taurine is required for calcium homeostasis. See also this paper. See also this paper. With taurine deficiencies fine control of intracellular calcium homesostasis is lost which can lead to a hidden osteomalicia as calcium levels are normal or very near normal.
The treatment for bach ache would be to take taurine, vitamin D, calcium carbonate. and vitamin K (MK-7). Vitamin K is also a fat soluble whose absorption could be impaired by low levels of taurine. Vitamin K in the form of MK-7 is much better absorbed than other forms of vitamin K. Vitamin D, vitamin K (MK-7) and calcium carbonate would be taken with food for better absorption while taurine would be taken on an empty stomach for better absorption. The right supplements could be very helpful in treating back pain.