Serum Level vs Intake Charts

Vitamin D intake observed to produce noted 25(OH)D serum levels in 90% of adults (age 18 years and older), weighing 150 lbs. (N=7324).

Example: With a starting serum level of 20 ng/ml an additional intake of approximately 5,000 IU/day would be sufficient for 90% of adults (age 18 years and older, weighing 150 lbs) to achieve a serum level of at least 40 ng/ml (100 nmol/L).

intake change for serum level


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