Which supplement works better to improve sports performance: arginine or tyrosine?

Ratings at a Glance

Supplement	Effectiveness Rating	Confidence Rating
Arginine
Tyrosine

Effectiveness Rating: Arginine vs Tyrosine

The effectiveness rating is a measure of the supplements' ability to improve sports performance. This rating answers the question of whether or not a supplement does what it claims. The evidence backing up arginine to improve sports performance is much better than the evidence backing up tyrosine. Arginine should provide positive results while tyrosine will not.

Confidence Rating: Arginine vs Tyrosine

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 arginine and tyrosine 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.