if runnning a t-booster does taking it pre workout do anything more than placebo really? isn't it much more of a cumulative effect?
Some products will have a cumulative effect to reap the Testosterone boosting benefits, whereas other properties of the products can and will be felt almost immediately.
It depends on the Testosterone booster (i.e. T-911 definitely helps with energy), its recommended timing (i.e. Drive is recommended to be dose ~60 min pre-training), and the individual (i.e. some people train first thing and many products' first dose is recommended as first thing), etc. Using Testosterone boosters pre-training can aid in such factors as increased aggression.
Some preworkout products actually have Testosterone boosting effects and properties (i.e. RPM, Anadraulic State GT, and LIT UP).
~Rosie~