Dietary Intake Vitamin D

Vitamin d3 cholecalciferol is synthesized by sunlight exposure from 7 dehydrocholesterol a precursor of cholesterol that can also act as provitamin d3.

Dietary intake vitamin d. Vitamin d status can be measured in two ways vitamin d dietary intakes and vitamin d blood levels. 1 department of medicine section of endocrinology nutrition and diabetes vitamin d skin and bone research laboratory boston university medical center boston massachusetts 02118 usa. The review was to include consideration of chron. Children and adults aged 1 70 need approximately 600 iu of vitamin d per day and it can come from a combination of food sources and sunlight.

The charge to the committee institute of medicine committee to review dietary reference intakes for vitamin d and calcium was to assess current relevant data and update as appropriate the dris dietary reference intakes for vitamin d and calcium. Vitamin d is unique in that there is another source besides diet and supplements namely sunlight. It is the blood level data that gives a true picture of the vitamin d status in the body. Variables significantly associated with 25 oh d 20 ng ml were assessed using simple and multiple logistic regression.

Dietary intake of vitamin d3 is essential when the skin is exposed for short periods to ultraviolet b light uv b a category of invisible light rays such as uv a and uv c. Vitamin d intake is recommended at 400 800 iu day or 10 20 micrograms. Hossein nezhad a 1 holick mf. Meanwhile adults over 70 should aim for at least.

Vitamin d intake from food contributes to vitamin d status together with supplements and sun exposure at higher latitudes vitamin d intake is an important source of vitamin d as skin synthesis of vitamin d is not possible year round due to insufficient uv b radiation during winter. Dietary intake of vitamin d3 is essential when the skin is exposed for short periods to ultraviolet b light uv b a category of invisible light rays such as uv a and uv c. Vitamin d3 cholecalciferol is synthesized by sunlight exposure from 7 dehydrocholesterol a precursor of cholesterol that can also act as provitamin d3. An increase in sunlight exposure of more than 15 min for 1 to 2 days per week in non winter or dietary intake of 2 μg day of vitamin d resulted in an elevation of 1 ng ml in serum 25 oh d levels.

Optimize dietary intake of vitamin d.