A recent study published in the American Journal of Preventive Cardiology found that higher vitamin D doses do not ... 1000, 2,000, or 4,000 international units (IU) per day of vitamin D3 ...
There are two types of vitamin D ... D3. Cod liver oil has vitamin D3 in it. Rickets, a defect in bone growth in infancy and childhood, was first identified in 1650 (Welch, Bergstrom, & Tsang, 2000).
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