Every intervention Outliyr has scored for reaction time, ranked by its BioHarmony score for this use case rather than its overall rating. The number beside each name is how well that one thing works for reaction time; the tier beside it is what it is worth once safety, cost and effort are counted across everything else.
29 of 73 evaluated interventions score 3.0+ out of 10 for reaction time · 4 comparisons
Neurofeedback belongs at 6.5/10 for reaction time, with Voigt et al. 2024 supporting the practical upside. Reaction-time benefits likely track attention, processing speed, and vigilance. Westwood 2025 found processing speed was one…
Read the Neurofeedback report →The evidence base rates Whole-Body Vibration for reaction-time at 6.5/10, reflecting modest support from athlete trials Peng 2024. Whole-Body Vibration aims to improve reaction-time by brief high-frequency mechanical stimulation that primes neuromuscular…
Read the Whole-Body Vibration report →Mechanistically, Modafinil scores 6.5/10 for reaction time because the evidence points to a plausible use case without proving a universal response. Mann G et al. 2026 is the best anchor here because…
Read the Modafinil report →In reaction time, L-Theanine earns 6.0/10 only under the right assumptions. Giesbrecht 2010 and other caffeine-stack trials support faster attention-task performance. Mátyus 2025 found a narrow RVIP/RVRT reaction-time benefit but not broad…
Read the L-Theanine report →Paraxanthine scores 5.5/10 for reaction time because the reported benefit is most likely to show up on short-latency cognitive or performance tasks. The strongest support comes from Yoo C. et al. 2021,…
Read the Paraxanthine (Enfinity) report →For reaction time, the 5.0/10 score reflects how Vagus Nerve Stimulation performs in Sun et al. 2025. Attention effects may translate indirectly to reaction time, but Track 1 cognition evidence cautions against…
Read the Vagus Nerve Stimulation report →Reaction-time is 5.0/10 because Semaglutide has no direct evidence for faster response speed in this report. Yao 2024 supports glycemic control and weight effects, which could indirectly help if glucose swings were…
Read the Semaglutide report →Dynamine scores 5.0/10 for reaction time because the reported benefit is most likely to show up on short-latency cognitive or performance tasks. The strongest support comes from Cintineo H. et al. 2022,…
Read the Dynamine (Methylliberine) report →Phenylpiracetam scores 5.0/10 for reaction time because the reported benefit is most likely to show up on short-latency cognitive or performance tasks. The strongest support comes from Malykh A. et al. 2010,…
Read the Phenylpiracetam (Phenotropil) report →Aerobic fitness may modestly support processing speed and reaction time through vascular and cognitive mechanisms. The effect is indirect and smaller than sport-specific drills, sleep optimization, or stimulant-like acute interventions.
Read the Zone 2 Cardio report →No direct reaction-time evidence was verified. The use case remains unsupported.
Read the Essential Amino Acids report →No direct reaction-time evidence, apart from sleep-restriction performance data that may not generalize.
Read the Glycine report →No direct reaction-time evidence was identified. Any alertness improvement is subjective and likely mediated through stress, mood, or libido rather than validated psychomotor testing.
Read the Tongkat Ali report →No direct reaction-time evidence exists. Acute performance enhancement is not a metformin use case.
Read the Metformin report →No direct reaction-time trial or sports-cognition endpoint. Score remains below neutral.
Read the Ca-AKG (Calcium Alpha-Ketoglutarate) report →Reaction time could improve indirectly if TRT corrects fatigue, anemia, or depressive symptoms in a deficient user, but direct reaction-time evidence is limited and cognition findings are not strong.
Read the TRT (Testosterone Replacement Therapy) report →Acute attention and information-processing reports from Russian human work suggest possible reaction-time relevance, but no verified reaction-time RCT establishes the effect.
Read the Semax report →Some cognitive processing-speed improvements in attention tasks.
Read the HRV Biofeedback report →Any reaction-time benefit is indirect through fitness and acute arousal. The protocol does not specifically train perceptual speed or decision speed.
Read the Norwegian 4×4 report →Sprinting trains rapid force production, but any reaction-time or perceptual-speed benefit is indirect through arousal and fitness rather than specific cognitive training.
Read the Sprinting (Sprint Interval Training) report →Reaction-time support is modest and likely mediated by stress reduction. V0 evidence included reaction-time improvements, and Zhu 2026 supports broader processing-speed outcomes. This is not a stimulant-like acute performance lever.
Read the Ashwagandha report →No direct reaction time or coordination evidence exists for tirzepatide. Glycemic stability might help some users with diabetes. Under eating, nausea, hypoglycemia risk with insulin or sulfonylureas, and dehydration could impair reaction…
Read the Tirzepatide report →Cognitive processing speed improved in older adults per Hadanny 2020. Reaction-time and coordination are not established primary endpoints. Score below neutral because the reaction-time use case is best supported indirectly through processing-speed…
Read the Hyperbaric Oxygen Therapy report →Dehydration can impair attention and reaction-related tasks; correction restores baseline.
Read the Electrolytes report →No direct reaction-time evidence supports BFR as a performance-timing intervention.
Read the Blood-Flow Restriction Training report →Reaction-time support is indirect through mood, sleep, and attention; no direct reaction-time saffron protocol is established.
Read the Saffron report →Small cognitive-speed findings exist in v0.x, but replication and clinical relevance remain limited.
Read the Astaxanthin report →Docherty 2023 reported acute Stroop performance-speed change, which weakly supports reaction-time-adjacent cognition. The evidence is too small for a strong score.
Read the Lion’s Mane report →Nothing matches those filters.
Head-to-head reports and category rankings that name a winner on this use case.
Bromantane and semax tie at 7.1, and they are the only two in this category scored strong recommend. Selank is third at 6.9 if anxiety rather than focus…
Both score anxiety 7.5, so the tie-breaker is time. L-theanine works in about an hour and you take it when you need it. Ashwagandha takes eight weeks and…
Epitalon, if sleep is the question. It scores sleep quality 6.5 against pinealon's 1.7, because it acts on the pineal gland and melatonin output while pinealon is a…
Pick by symptom. Semax scores 7.1 and wins focus. Selank scores 6.9 and wins anxiety, mood and stress resilience. The 0.2 gap decides nothing. The mechanisms overlap at…
Neurofeedback, at 6.5 out of 10 for reaction time. Neurofeedback belongs at 6.5/10 for reaction time, with Voigt et al.
Of the top-scoring options, Glycine is the least expensive at about $2 a month, scoring 4.5 out of 10 for reaction time.
29 of the 73 interventions evaluated for reaction time score 3.0 out of 10 or better, which is the cut-off for appearing on this page.
