Which supplement works better to decrease fatigue: apple polyphenol extract or caffeine anhydrous?

Ratings at a Glance

Supplement	Effectiveness Rating	Confidence Rating
Apple Polyphenol Extract
Caffeine Anhydrous

Effectiveness Rating: Apple Polyphenol Extract vs Caffeine Anhydrous

The effectiveness rating is a measure of the supplements' ability to decrease fatigue. This rating answers the question of whether or not a supplement does what it claims. Both apple polyphenol extract and caffeine anhydrous have good (but not great) evidence showing they may be able to decrease fatigue. Both supplements should provide some positive results.

Confidence Rating: Apple Polyphenol Extract vs Caffeine Anhydrous

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.

Caffeine Anhydrous's confidence rating is higher than apple polyphenol extract's. This means caffeine anhydrous's effectiveness rating from above is more valid. This does not necessarily mean that caffeine anhydrous works better, it simply means the evidence (included in this database) backing up caffeine anhydrous is more established.