This content is for informational purposes only and is not a substitute for professional advice.
Performance Lab Stim should be treated as a stimulant-focus product and tested under one stimulant at a time, not layered onto coffee by habit.
Disclosure
This is an Unfair editorial review. We do not sell Performance Lab Stim. Product labels can change, so verify the current Supplement Facts panel before buying or logging it.
Methodology
We evaluate active dose transparency, stimulant dose, L-theanine match, tyrosine rationale, claim discipline, and sleep cost.
| Audit area | Why it matters |
|---|---|
| Caffeine dose | Main acute driver and main sleep risk |
| L-theanine dose | May change subjective stimulant profile |
| Tyrosine | More plausible under stress or sleep loss |
| B vitamins | Energy claims depend on deficiency context |
| Claims | Should not drift into disease treatment |
Protocol
| Step | Rule |
|---|---|
| Baseline | 7-10 comparable focus blocks |
| Active | Same product timing for 7-10 blocks |
| Controls | No extra coffee, nicotine, or pre-workout |
| Outcome | Output, anxiety, sleep latency |
| Stop | Chest pain, palpitations, panic, severe insomnia |
Sources
This article is educational and does not replace medical advice.
Performance Lab Stim official product page. https://www.performancelab.com/products/stim
↩FDA. Caffeine consumer update. https://www.fda.gov/consumers/consumer-updates/spilling-beans-how-much-caffeine-too-much
↩Dodd FL, et al. Caffeine and L-theanine study. https://pubmed.ncbi.nlm.nih.gov/25761845/
↩Pomeroy DE, et al. Supplements and cognitive performance review. https://pmc.ncbi.nlm.nih.gov/articles/PMC7071459/
↩