Which supplement works better to increase strength: ashwagandha extract (withania somnifera) or caffeine anhydrous?

Ratings at a Glance

Supplement	Effectiveness Rating	Confidence Rating
Ashwagandha Extract (Withania Somnifera)
Caffeine Anhydrous

Effectiveness Rating: Ashwagandha Extract (Withania Somnifera) vs Caffeine Anhydrous

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 ashwagandha extract (withania somnifera) is great, while the evidence backing up caffeine anhydrous is good. Ashwagandha Extract (Withania Somnifera) should be able to increase strength more effectively, however both supplements should provide positive results.

Confidence Rating: Ashwagandha Extract (Withania Somnifera) 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.

Both ashwagandha extract (withania somnifera) and caffeine anhydrous have great confidence rating. This means both supplement's effectiveness ratings above are valid.