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

Ratings at a Glance

Supplement	Effectiveness Rating	Confidence Rating
Caffeine Anhydrous
Sodium

Effectiveness Rating: Caffeine Anhydrous 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 backing up caffeine anhydrous to improve running performance is much better than the evidence backing up sodium. Caffeine Anhydrous should provide positive results while sodium will not.

Confidence Rating: Caffeine Anhydrous 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 caffeine anhydrous'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.