★ "What Worked For Me" Outcome Report @NorthWoodsLabs_WI • 45-59F • 2,000 IU D3 / 200 mg Mg glyc • Week 16

▲ 38 Helpful • 2 Peer Replies

Ergocalciferol to D3 + Mg glycinate (16 wks update): My baseline 25(OH)D was 14 ng/mL — what worked for others here?

My baseline 25(OH)D was 14 ng/mL. I completed 8 weeks of prescribed 50,000 IU ergocalciferol weekly, then moved to 2,000 IU D3 daily with dinner, which contains fat. I added 200 mg elemental magnesium glycinate at night, because I had calf cramps and poor sleep. At week 8 my level was 31 ng/mL, and at week 16 it was 36 ng/mL. Cramps dropped from nightly to about once a week. I tracked calcium, which stayed in range, and I did not use K2 because I had no personal indication. Takeaway: the switch from a high-dose phase to daily maintenance was easier to follow than weekly dosing.

⚕ Pinned FDA / NIH / PubMed Clinical Context • Siriporn Wattana — Literature & Label Auditor

DailyMed ergocalciferol labeling describes prescription 50,000 IU capsules for deficiency, and NIH ODS notes the 4,000 IU/day UL applies to unsupervised daily intake. Magnesium acts as a cofactor in vitamin D metabolism, but supplement effects on 25(OH)D are modest and vary between people.

Connected Clinical Guides: Condition: Vitamin D Deficiency Condition: Osteopenia Rx: Ergocalciferol Rx: Levothyroxine Supplement: Vitamin D3 Supplement: Vitamin K2 Mk7

Find Gastroenterologists (CPT 45378 / 43239) →

Verified Peer Replies (2)

@QuietPulse_CO • Verified Cohort Member • Week 16

Your sequence is a common one: a treatment phase followed by maintenance. Recheck 25(OH)D 8-12 weeks after any dose change, and ask about calcium and kidney function if you stay on higher doses long term.

@LabDetective_OR • Age 45-59 • Week 12

I did the same switch, from weekly ergocalciferol to D3 with dinner. My level went from 17 to 33 ng/mL. Splitting magnesium to the evening avoided any stomach upset.