Which supplement works better to improve immune function: calcium or krill oil?

Ratings at a Glance

Supplement	Effectiveness Rating	Confidence Rating
Calcium
Krill Oil

Effectiveness Rating: Calcium vs Krill Oil

The effectiveness rating is a measure of the supplements' ability to improve immune function. This rating answers the question of whether or not a supplement does what it claims. Both calcium and krill oil have good (but not great) evidence showing they may be able to improve immune function. Both supplements should provide some positive results.

Confidence Rating: Calcium vs Krill Oil

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 calcium and krill oil 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.