He was also reportedly taking fluids, mineral supplements, glucose and juice on a daily basis.

CNN: STORY HIGHLIGHTS

Both dietary supplements contain 105 micrograms of the trace mineral selenium per daily dose, or about twice the Recommended Daily Allowance, which is 55 micrograms a day for adults, according to the center.

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Cliff Rosen, past president of the American Society for Bone and Mineral Research, agreed that there isn't much data showing calcium-and-vitamin-D supplements can prevent bone fractures.

WSJ: Vitamin D and Calcium Supplements May Not Stop Fractures