Which supplement works better to improve mood: multivitamins or selenium?

Ratings at a Glance

Supplement	Effectiveness Rating	Confidence Rating
Multivitamins
Selenium

Effectiveness Rating: Multivitamins vs Selenium

The effectiveness rating is a measure of the supplements' ability to improve mood. This rating answers the question of whether or not a supplement does what it claims. The evidence backing up selenium is great, while the evidence backing up multivitamins is good. Selenium should be able to improve mood more effectively, however both supplements should provide positive results.

Confidence Rating: Multivitamins vs Selenium

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.

Multivitamins's confidence rating is higher than selenium's. This means multivitamins's effectiveness rating from above is more valid. This does not necessarily mean that multivitamins works better, it simply means the evidence (included in this database) backing up multivitamins is more established.