Which supplement works better to improve sports performance: betaine or yohimbine?

Ratings at a Glance

Supplement	Effectiveness Rating	Confidence Rating
Betaine
Yohimbine

Effectiveness Rating: Betaine vs Yohimbine

The effectiveness rating is a measure of the supplements' ability to improve sports performance. This rating answers the question of whether or not a supplement does what it claims. The evidence shows neither betaine nor yohimbine has the ability to improve sports performance. Neither supplement will provide positive results for this claim.

Confidence Rating: Betaine vs Yohimbine

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 betaine and yohimbine 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.