The Claim

In overweight and obese adults, combined supplementation with 360 mg magnesium glycinate and 1000 IU vitamin D3 taken three times daily for 12 weeks may increase serum 25-hydroxyvitamin D (25OHD) levels by an average of 6.3 ng/mL, which is significantly greater than the increase seen with vitamin D3 alone or placebo, suggesting that magnesium co-supplementation may enhance vitamin D status in this population.

Source: The effect of combined magnesium and vitamin D supplementation on vitamin D status, systemic inflammation, and blood pressure: A randomized double-blinded controlled trial.

What the research says

Supports is higher

Support is ahead, but a single strong opposing study can change this.

Supports
55score
Challenges
0score

These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.

Cause and effect
1 study reviewed
In plain English

For overweight and obese adults, taking a daily combo of magnesium and vitamin D three times a day for 12 weeks raises their blood vitamin D levels more than taking vitamin D alone or a dummy pill. This shows that magnesium helps the body use vitamin D better.

See the scientific wording

In overweight and obese adults, combined supplementation with 360 mg magnesium glycinate and 1000 IU vitamin D3 taken three times daily for 12 weeks may increase serum 25-hydroxyvitamin D (25OHD) levels by an average of 6.3 ng/mL, which is significantly greater than the increase seen with vitamin D3 alone or placebo. This suggests that magnesium co-supplementation may enhance vitamin D status in this population.

Why this might work

Vitamin D needs help from magnesium to become active in the body. Magnesium acts like a helper that allows the liver and kidneys to change vitamin D into the form that the body can use. When people take extra magnesium along with vitamin D, their bodies can make more of this active form, so the level of 25-hydroxyvitamin D in their blood goes up more than if they only took vitamin D.

Supported mechanismbased on 1 study

What the research says

1 study

  1. Study: The effect of combined magnesium and vitamin D supplementation on vitamin D status, systemic inflammation, and blood pressure: A randomized double-blinded controlled trial.

    This study tested the exact same idea—giving overweight adults magnesium and vitamin D together—and found that their vitamin D levels went up more than with vitamin D alone, by about 6.3 units.

Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies

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