Which supplement works better to increase strength: betaine or soy protein?

Ratings at a Glance

Supplement	Effectiveness Rating	Confidence Rating
Betaine
Soy Protein

Effectiveness Rating: Betaine vs Soy Protein

The effectiveness rating is a measure of the supplements' ability to increase strength. This rating answers the question of whether or not a supplement does what it claims. The evidence backing up soy protein to increase strength is much better than the evidence backing up betaine. Soy Protein should provide positive results while betaine will not.

Confidence Rating: Betaine vs Soy Protein

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 soy protein have great confidence rating. This means both supplement's effectiveness ratings above are valid.