Which supplement works better to improve muscular endurance: betaine or creatine monohydrate?

Ratings at a Glance

Supplement	Effectiveness Rating	Confidence Rating
Betaine
Creatine Monohydrate

Effectiveness Rating: Betaine vs Creatine Monohydrate

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

Confidence Rating: Betaine vs Creatine Monohydrate

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.

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