https://www.naturalnews.com/2026-02-24-calcium-drinking-milk-save-bones.html
"
Perhaps the most critical partner for calcium is vitamin D. Without it, calcium absorption plummets. Clinical nutritionist Sheridan Genrich likens calcium to the "bricks" for building a bone "house," while active vitamin D is the essential "bricklayer." She notes that as we age, the body becomes less efficient at both absorbing calcium and activating vitamin D, making the pairing even more crucial. Vitamin D deficiency disrupts the entire calcium metabolism process..."