Which supplement works better to decrease fatigue: betaine or caffeine anhydrous?

Ratings at a Glance

Supplement	Effectiveness Rating	Confidence Rating
Betaine
Caffeine Anhydrous

Effectiveness Rating: Betaine vs Caffeine Anhydrous

The effectiveness rating is a measure of the supplements' ability to decrease fatigue. This rating answers the question of whether or not a supplement does what it claims. The evidence shows caffeine anhydrous is better than betaine in its ability to decrease fatigue. Caffeine Anhydrous should provide some positive results while betaine will not.

Confidence Rating: Betaine vs Caffeine Anhydrous

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.

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