Which supplement works better to improve muscular endurance: p-synephrine or tribulus terrestris?

Ratings at a Glance

Supplement	Effectiveness Rating	Confidence Rating
P-Synephrine
Tribulus Terrestris

Effectiveness Rating: P-Synephrine vs Tribulus Terrestris

The effectiveness rating is a measure of the supplements' ability to improve muscular endurance. This rating answers the question of whether or not a supplement does what it claims. The evidence shows p-synephrine is better than tribulus terrestris in its ability to improve muscular endurance. P-Synephrine should provide some positive results while tribulus terrestris will not.

Confidence Rating: P-Synephrine vs Tribulus Terrestris

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 p-synephrine and tribulus terrestris 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.