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. 2020 Jul 15;12(7):2097. doi: 10.3390/nu12072097

Figure 3.

Figure 3

Biochemical measurements of a 52-year-old multiple sclerosis female who received 40,000 international units per day of vitamin D3 for 5 years. Abbreviation: 1,25(OH)2D: 1,25-dihydroxyvitamin D; 25(OH)D: 25-hydroxyvitamin D; PTH: parathyroid hormone. Note: Red solid line represents serum 25-hydroxyvitamin D levels. Blue solid line represents serum total calcium levels. Green solid line represents serum 1,25-dihydroxyvitamin D levels (15–80 pg/mL). Black dotted line represents serum intact parathyroid hormone levels (18–72 pg/mL). Red highlight represents normal range for serum 25-hydroxytamin D (30–100 ng/mL/75–250 nmol/L). Green highlight represents normal range for serum 1,25-dihydroxyvitamin D (15–80 pg/mL). Blue dashed line represents normal range for serum total calcium (8.5–10.5 mg/dL). Black dashed line represents normal range for serum intact parathyroid hormone (18–72 pg/mL). Reproduced with permission from Holick MF, copyright 2020.