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 5000 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.
Dimensions: 11 x 8.5 inches