Which supplement works better to increase testosterone: melatonin or zinc?

Ratings at a Glance

Supplement	Effectiveness Rating	Confidence Rating
Melatonin
Zinc

Effectiveness Rating: Melatonin vs Zinc

The effectiveness rating is a measure of the supplements' ability to increase testosterone. This rating answers the question of whether or not a supplement does what it claims. The evidence shows zinc is better than melatonin in its ability to increase testosterone. Zinc should provide some positive results while melatonin will not.

Confidence Rating: Melatonin vs Zinc

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 zinc 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.