Ref : Medscape
Vitamin D deficiency and insufficiency have been defined as a 25-hydroxyvitamin D <20 ng/ml and 21-29 ng/ml respectively. For every 100 IU of vitamin D ingested the blood level of 25-hydroxyvitamin D, the measure vitamin D status, increases by 1 ng/ml. It is estimated that children need at least 400-1000 IU of vitamin D a day while teenagers and adults need at least 2000 IU of vitamin D a day to satisfy their body's vitamin D requirement.
Gender, age, diet, and health impact the requirements for calcium and Vitamin D. Milk, yogurt, cheese, and foods and juices fortified with calcium and vitamin D remain the best dietary sources of calcium and vitamin D.
In general, the risk of adverse effects for vitamin D begins when intake surpasses 4,000 IUs per day. The risk of harm for calcium begins when intake surpasses 2,000 milligrams per day. Side effects of excess vitamin D or calcium most immediately include hypercalcemia and hypercalciuria.
Vitamin D deficiency and insufficiency have been defined as a 25-hydroxyvitamin D <20 ng/ml and 21-29 ng/ml respectively. For every 100 IU of vitamin D ingested the blood level of 25-hydroxyvitamin D, the measure vitamin D status, increases by 1 ng/ml. It is estimated that children need at least 400-1000 IU of vitamin D a day while teenagers and adults need at least 2000 IU of vitamin D a day to satisfy their body's vitamin D requirement.
Gender, age, diet, and health impact the requirements for calcium and Vitamin D. Milk, yogurt, cheese, and foods and juices fortified with calcium and vitamin D remain the best dietary sources of calcium and vitamin D.
In general, the risk of adverse effects for vitamin D begins when intake surpasses 4,000 IUs per day. The risk of harm for calcium begins when intake surpasses 2,000 milligrams per day. Side effects of excess vitamin D or calcium most immediately include hypercalcemia and hypercalciuria.
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