Which supplement works better to improve running performance: glycine or sodium?

Ratings at a Glance

Supplement	Effectiveness Rating	Confidence Rating
Glycine
Sodium

Effectiveness Rating: Glycine vs Sodium

The effectiveness rating is a measure of the supplements' ability to improve running performance. This rating answers the question of whether or not a supplement does what it claims. The evidence shows glycine is better than sodium in its ability to improve running performance. Glycine should provide some positive results while sodium will not.

Confidence Rating: Glycine vs Sodium

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.

Sodium's confidence rating is higher than glycine's. This means sodium's effectiveness rating from above is more valid. This does not necessarily mean that sodium works better, it simply means the evidence (included in this database) backing up sodium is more established.