Taking a daily vitamin D pill of 8000 IU for 3 months can boost vitamin D levels in young men from dangerously low to healthy levels, while those who take a fake pill (placebo) stay low.

47

Pro

0

Against

Evidence from Studies

Supporting (1)

47

Community contributions welcome

47

Vitamin D supplementation does not enhance resistance training-induced gains in muscle strength and lean body mass in vitamin D deficient young men

Randomized Controlled Trial

Human

2021 Jul

The study gave young men with low vitamin D 8000 IU a day for 12 weeks, and their vitamin D levels shot up to healthy levels — exactly what the claim says. The placebo group stayed low, so the supplement worked as described.

Contradicting (0)

0

Community contributions welcome

No contradicting evidence found

Gold Standard Evidence Needed

According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.

Source Study

Vitamin D supplementation does not enhance resistance training-induced gains in muscle strength and lean body mass in vitamin D deficient young men

Score: 47

DOI: 10.1007/s00421-021-04674-9

Similar Assertions

Taking a high-dose vitamin D pill every day for three months won't help young men who are low on vitamin D build more muscle or gain more lean body mass from weight training, even though their vitamin D levels go up to normal.

47

0

87%

If young men who don’t have enough vitamin D take a high-dose vitamin D pill every day for 12 weeks while working out, they lose belly fat — but if they take a fake pill instead, their belly fat doesn’t change.

47

0

83%

Taking a high-dose vitamin D pill every day for three months won't help young men who are low on vitamin D get stronger from weight training—and might even make them weaker compared to those who take a sugar pill.

47

0

80%

For older women who have trouble moving around and don’t have enough vitamin D, taking a daily vitamin D pill for four months might make their muscle fibers about 10% bigger than if they took a sugar pill — which could mean it helps build muscle.

61

0

80%

Taking a daily vitamin D3 pill (4000 IU) for four months can help older adults with low vitamin D levels build stronger muscle fibers by increasing the number of vitamin D receptors inside their muscle cells.

61

0

79%