Vitamin D3

Does vitamin d3 work?

Vitamin D3 Claims

The supplement database currently has 7 claims for Vitamin D3. The claims include: increase weight loss, decrease body fat, increase strength, improve cycling sprint performance, improve sports performance, increase muscle mass, increase bone density.

Overall Effectiveness Rating for Vitamin D3

The overall effectiveness rating for vitamin d3 is 1.6 out of 3. This rating means there is some evidence that using vitamin d3 may lead to positive results. This rating also means that some evidence does not back up all claims. Below you can find individual ratings for specific claims.

Overall Confidence Rating for Vitamin D3

There are 17 studies in the database on vitamin d3; the confidence rating is 49. A score above 80 means the effectiveness rating for this supplement is reliable. A score under 80 means there is insufficient evidence to ensure a reliable effectiveness rating. Note, this rating is for vitamin d3 as a whole. There are also individual ratings for the claims below.

Individual Claims

The overall ratings above do no necessarily reflect each claim about vitamin d3. Individual claims can have higher or lower ratings. For example, some supplements may have a lot of backing for one claim, but be completely useless for another. Click on claims below for more information.

The effectiveness rating for vitamin d3's ability to decrease body fat is 2 out of 3. The confidence rating for this claim is 80. This means there is not enough evidence in the database on this claim and the effectiveness rating above is not valid. Read more about vitamin d3's ability to decrease body fat.

Effectiveness Rating for this claim: 2 out of 3

Confidence Rating for this claim: 80

The effectiveness rating for vitamin d3's ability to improve cycling sprint performance is 1 out of 3. The confidence rating for this claim is 20. This means there is not enough evidence in the database on this claim and the effectiveness rating above is not valid. Read more about vitamin d3's ability to improve cycling sprint performance.

Effectiveness Rating for this claim: 1 out of 3

Confidence Rating for this claim: 20

The effectiveness rating for vitamin d3's ability to improve sports performance is 1 out of 3. The confidence rating for this claim is 20. This means there is not enough evidence in the database on this claim and the effectiveness rating above is not valid. Read more about vitamin d3's ability to improve sports performance.

Effectiveness Rating for this claim: 1 out of 3

Confidence Rating for this claim: 20

The effectiveness rating for vitamin d3's ability to increase bone density is 2 out of 3. The confidence rating for this claim is 40. This means there is not enough evidence in the database on this claim and the effectiveness rating above is not valid. Read more about vitamin d3's ability to increase bone density.

Effectiveness Rating for this claim: 2 out of 3

Confidence Rating for this claim: 40

The effectiveness rating for vitamin d3's ability to increase muscle mass is 1 out of 3. The confidence rating for this claim is 20. This means there is not enough evidence in the database on this claim and the effectiveness rating above is not valid. Read more about vitamin d3's ability to increase muscle mass.

Effectiveness Rating for this claim: 1 out of 3

Confidence Rating for this claim: 20

The effectiveness rating for vitamin d3's ability to increase strength is 2 out of 3. The confidence rating for this claim is 80. This means there is not enough evidence in the database on this claim and the effectiveness rating above is not valid. Read more about vitamin d3's ability to increase strength.

Effectiveness Rating for this claim: 2 out of 3

Confidence Rating for this claim: 80

The effectiveness rating for vitamin d3's ability to increase weight loss is 1 out of 3. The confidence rating for this claim is 80. This means there is not enough evidence in the database on this claim and the effectiveness rating above is not valid. Read more about vitamin d3's ability to increase weight loss.

Effectiveness Rating for this claim: 1 out of 3

Confidence Rating for this claim: 80