Which supplement works better to improve cognitive ability: caffeine anhydrous or golden root extract - rhodiola?

Ratings at a Glance

Supplement	Effectiveness Rating	Confidence Rating
Caffeine Anhydrous
Golden Root Extract - Rhodiola

Effectiveness Rating: Caffeine Anhydrous vs Golden Root Extract - Rhodiola

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

Confidence Rating: Caffeine Anhydrous vs Golden Root Extract - Rhodiola

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 golden root extract - rhodiola'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.