Which supplement works better to improve cycling performance: l-citrulline or phosphorus?

Ratings at a Glance

Supplement	Effectiveness Rating	Confidence Rating
L-Citrulline
Phosphorus

Effectiveness Rating: L-Citrulline vs Phosphorus

The effectiveness rating is a measure of the supplements' ability to improve cycling performance. This rating answers the question of whether or not a supplement does what it claims. The evidence backing up l-citrulline is great, while the evidence backing up phosphorus is good. L-Citrulline should be able to improve cycling performance more effectively, however both supplements should provide positive results.

Confidence Rating: L-Citrulline vs Phosphorus

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 l-citrulline and phosphorus 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.