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

Ratings at a Glance

Supplement	Effectiveness Rating	Confidence Rating
Caffeine Anhydrous
Creatine Hydrochloride

Effectiveness Rating: Caffeine Anhydrous vs Creatine Hydrochloride

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. Both caffeine anhydrous and creatine hydrochloride have great evidence backing up their ability to improve running performance. They should both provide positive results.

Confidence Rating: Caffeine Anhydrous vs Creatine Hydrochloride

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 caffeine anhydrous and creatine hydrochloride 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.