Which supplement works better to increase testosterone: hmb or vitamin d3?

Ratings at a Glance

Supplement	Effectiveness Rating	Confidence Rating
HMB
Vitamin D3

Effectiveness Rating: HMB vs Vitamin D3

The effectiveness rating is a measure of the supplements' ability to increase testosterone. This rating answers the question of whether or not a supplement does what it claims. The evidence shows vitamin d3 is better than hmb in its ability to increase testosterone. Vitamin D3 should provide some positive results while hmb will not.

Confidence Rating: HMB vs Vitamin D3

Another factor to take into account when comparing supplements is the confidence rating. This rating is a measure of how valid each supplement's effectiveness rating is. Remember, the confidence rating is a measure of how much you can trust the effectiveness rating. This rating is based on how many studies are included in the database on a supplement's claims. Ideally, you want a high effectiveness AND confidence rating.

Both hmb and vitamin d3 have low confidence ratings. This means neither supplement has an adequate amount of research to back up this claim. A low confidence rating questions the validity of the effectiveness rating.