A commercial formula can contain ingredients with published research and still lack direct evidence as a finished product.
Different Dose
The amount in a product may differ from the amount used in a study.
Different Extract
Botanical extracts can vary in active compounds and standardization.
Different Population
Results in deficient or clinically selected participants may not apply to healthy users.
Combination Effects
Combining ingredients can change tolerability and does not guarantee additive benefits.
Different Outcome
A study showing a change in a laboratory marker is not the same as a study demonstrating a clinically meaningful improvement in sexual function.
Different Duration
Trials may run for weeks or months, while marketing can imply immediate effects. Time frame is part of the intervention.
A Practical Example
If a tongkat ali extract was tested at a specific standardized dose, that result cannot automatically be assigned to a lower-dose multi-ingredient capsule using a different extract.
Related Research
Editorial owner: EndoPeak Reviews Editorial Team · Last reviewed: October 3, 2026