Which supplement works better to improve cognitive ability: docosahexaenoic acid (dha) or vitamin b12?

Ratings at a Glance

Supplement	Effectiveness Rating	Confidence Rating
Docosahexaenoic Acid (DHA)
Vitamin B12

Effectiveness Rating: Docosahexaenoic Acid (DHA) vs Vitamin B12

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. The evidence shows neither docosahexaenoic acid (dha) nor vitamin b12 has the ability to improve cognitive ability. Neither supplement will provide positive results for this claim.

Confidence Rating: Docosahexaenoic Acid (DHA) vs Vitamin B12

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.

Docosahexaenoic Acid (DHA)'s confidence rating is higher than vitamin b12's. This means docosahexaenoic acid (dha)'s effectiveness rating from above is more valid. This does not necessarily mean that docosahexaenoic acid (dha) works better, it simply means the evidence (included in this database) backing up docosahexaenoic acid (dha) is more established.