Verdict
Not enough evidence
Magnesium is needed to convert vitamin D into its active form.
2 sources: 2 positive
By Arun AgrahriLast reviewed
Short answer
Yes. Magnesium is required for the enzyme steps that turn vitamin D into its active form. Mark Hyman has a dedicated video on this interaction, and Peter Attia groups calcium, D3 and magnesium as 'the big three' for bone health.
Vitamin D supplements are worth taking.
The verdict on Vitamin D overall. 12 sources: 6 positive, 6 partly
positive partly neutral negative Each researcher and each study counts once per claim, however often they come up.
Magnesium is needed to convert vitamin D into its active form.
2 sources: 2 positive. Fewer than 3 sources so far.
Researchers say
2 positive
Mark Hyman, on The Dr. Hyman Show, at 40:05
Positive Video · Opinion
Open the tape at 40:05 →“the range I usually recommend is two to 5,000 units a day”
Peter Attia, on The Drive, at 01:40
Positive Video · Opinion
Open the tape at 01:40 →“magnesium is a co-factor in the enzymatic conversion of vitamin D”
Studies show
No study counted yet.
Mark Hyman, on The Dr. Hyman Show, at 40:05 Video · positive · Opinion
“the range I usually recommend is two to 5,000 units a day”
Peter Attia, on The Drive, at 01:40 Video · positive · Opinion
“magnesium is a co-factor in the enzymatic conversion of vitamin D”
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Magnesium is needed to convert vitamin D into its active form, so the two work together. Mark Hyman, on his own show, has a dedicated video on this interaction and recommends D3 with K2 and magnesium as a trio.
Peter Attia calls calcium, vitamin D3 and magnesium "the big three" for bone health. Rhonda Patrick confirms that magnesium deficiency can impair vitamin D metabolism.
If you take vitamin D and your blood level isn't improving, low magnesium may be the bottleneck. Aim for 300-400mg of magnesium daily from all sources.
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Full Vitamin D evidence report
The verdict on every claim, and where the sources disagree