RCT of Vitamin D in 379 elderly UK adults aged ≥70 y (48% women) give either 12,000 IU, 24,000 IU, or 48,000 IU. There was no ΔBMD, but parathyroid hormone decreased in all 3 groups (significantly betw 48,000 and 12,000-IU groups (P < 0.01). https://t.co/2ZxJ3kcYqx