Is your pre-workout properly dosed?
Pick a pre-workout and see per ingredient how much is in it, whether that reaches the amount used in research, and how strong that research is. Those are two separate things: a generous dose of something without evidence is still worth little.
The number under the barcode on the back of the tub. Eight, twelve or thirteen digits.
How we judge this
Green needs both: enough of the ingredient, and research that supports that amount. Red needs only one of the two. Too little means nothing happens, however strong the evidence. Barely any evidence means we do not know whether anything happens, however generous the dose. Above the range counts as at dose and not as better.