Vitamin D
D is a steroid hormone, health effects
Blood levels
25(OH)D - 25 hydroxivitamin D - calcifediol - кальцифедиол
by MedCram
| ng/mL | nmol/L | |
|---|---|---|
| Deficient | < 30 | < 75 |
| Insufficient | 30 - 50 | 75 - 125 |
| Optimal | 51 - 70 | 126 - 175 |
| Treatment for diseases | 71 - 100 | 176 - 250 |
| Too high | > 100 | > 250 |
Nanomole conversion: nmol/L = 2.5 * ng/mL
Mass equivalent of 1 international unit: 1 IU Vitamin D = 0.025 µg D2/D3 ≈ 0.65 pmol
Age differences
The amount of previtamin D3 produced in the skin from 8 - 18 yr subjects can me more that twofold (x2) greater than from the 77 - 82 yr old subjects
D and BMI
Vitamin D can be stored in fat. A lot of fat leaves less soluble D to be used.
D supplement to blood levels
in a first 10000 UIs of D supplement
each 1000 UIs increase the blood levels by 4.8 ng/mL (12 nmol/L)
in 15000 to 20000 UI range
each 1000 UI increases by just 0.40 ng/mL