Which supplement works better to improve cognitive ability: melatonin or vitamin b12?

Ratings at a Glance

Supplement	Effectiveness Rating	Confidence Rating
Melatonin
Vitamin B12

Effectiveness Rating: Melatonin 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 melatonin is better than vitamin b12 in its ability to improve cognitive ability. Melatonin should provide some positive results while vitamin b12 will not.

Confidence Rating: Melatonin 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.

Both melatonin and vitamin b12 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.