Which supplement works better to improve cognitive ability: iron or pine bark extract?

Ratings at a Glance

Supplement	Effectiveness Rating	Confidence Rating
Iron
Pine Bark Extract

Effectiveness Rating: Iron vs Pine Bark Extract

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 iron and pine bark extract have great evidence backing up their ability to improve cognitive ability. They should both provide positive results.

Confidence Rating: Iron vs Pine Bark Extract

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 iron and pine bark extract 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.