Ghost Fitness/Lion's mane/Does lion's mane help reaction time?
Does lion's mane help reaction time?
The short answer
No evidence either way. Simple reaction time, 150 to 250 milliseconds on a visual cue, has never been measured after lion's mane. The faster Stroop at sixty minutes is response inhibition, not reaction time, and vanished at four weeks. Sleep, caffeine, alcohol, age and dehydration move the number.
- 150 to 250 millisecondssimple visual reaction time in a healthy adult; the gap between a stimulus and the response, measured by a psychomotor vigilance task in a laboratory and by a ruler dropped through an open thumb and forefinger at home, where catching at 15cm is about 175ms and at 20cm about 200ms
- Five leverssleep loss lengthens it and multiplies lapses by the hour of debt; caffeine shortens it by tens of milliseconds at 100 to 200mg; alcohol lengthens it from the first unit; age adds a few milliseconds a decade from the twenties; dehydration past about two per cent of bodyweight slows it
- Zero reaction time studiesno human trial of lion's mane has run a psychomotor vigilance task or any simple reaction time measure; the sixteen-week trial used a cognitive scale, the cookie study used mood questionnaires
- Sixty minutes, one taskthe young-adult pilot's faster Stroop after a single 1.8g dose; Stroop measures response inhibition, overriding a conflicting cue, rather than simple reaction; not replicated after four weeks of daily use
Our brand: the worked example on this page
Futuro Labs Lion's Mane
- 13p a day
- 120 capsules, 1 capsule daily
- Lab tested
- Made in the UK
A capsule that does not claim to be one of the five levers, because it has never been tested as one: Futuro Labs Lion's Mane on Amazon UK, 1 capsule of 5:1 fruiting body extract labelled 1500mg mushroom equivalent, 120 capsules for £15.49, 120 days at 13p, vegan, UK made, lab tested, caffeine free, no claim. Full label breakdown. The stopwatch and the fast-versus-lasting columns are on the immediate effects page; the sensation ledger on the make you focus page; the first six hours hour by hour on the how quickly page.
The ruler on the bench: what simple reaction time is, how it is measured in a laboratory and between sets, and the five things with evidence for moving it
Does lion's mane help reaction time is a question with a test attached that costs nothing and fits between sets, so the honest page starts with the test. Simple reaction time is the gap between a stimulus and the response to it, a light and a button press, a sound and a finger lift, and in a healthy adult on a visual cue it runs at about 150 to 250 milliseconds, with the auditory version a little faster. In a laboratory it is measured by a psychomotor vigilance task, ten minutes of pressing a button whenever a counter starts, which gives a mean and, more usefully, a count of lapses, responses slower than 500 milliseconds, which is where sleep loss shows first. At home it is measured with a ruler: a friend holds a 30cm ruler vertically with the zero between a lifter's open thumb and forefinger, drops it without warning, and the centimetre mark at the catch converts to time by the physics of a falling object, so that a catch at 10cm is about 143 milliseconds, at 15cm about 175, at 20cm about 200 and at 25cm about 225. Ten drops averaged, with the fastest and slowest thrown out, is a number a lifter can write down on a Monday and compare on a Friday, which is more than any lion's mane study has done.
Five things move that number with a settled evidence base, and they are the levers against which any supplement claim has to be read. Sleep loss is the largest: the vigilance task was built for it, and each hour of sleep debt lengthens mean reaction time and multiplies the lapses, so that a week of six-hour nights produces the reaction profile of a legally drunk person without the person feeling drunk. Caffeine is the one substance that reliably shortens it, by tens of milliseconds at 100 to 200mg within thirty to sixty minutes, which is why it is the active ingredient in every reaction time supplement that has an effect and why a mushroom coffee's faster ruler catch belongs to the coffee. Alcohol lengthens it from the first unit, in a dose-related line that is the basis of the drink-drive limit. Age lengthens it by a few milliseconds a decade from the twenties, slowly enough that a forty-year-old lifter is within the healthy range and quickly enough that a sixty-year-old is measurably slower. Dehydration past about two per cent of bodyweight, which a hard session in a warm gym reaches, slows it alongside attention generally and reverses with the water. A lifter whose ruler catch lengthens this week has one of those five to look at, and the next section explains why the capsule is not a sixth.
Why the mushroom has no reaction time evidence, what the sixty-minute Stroop actually measured, and the honest buy
Lion's mane has never been tested on simple reaction time in any human study. The sixteen-week trial in older adults with mild impairment measured a cognitive scale that rates orientation, memory and reasoning, not speed; the menopausal cookie study measured depression and anxiety questionnaires; and the young-adult pilot, the one study of the mushroom in people of a lifter's age, measured a Stroop task, stress and mood, and ran no vigilance task and no simple reaction measure. The result that gets quoted as reaction time evidence is the pilot's faster Stroop at sixty minutes after a single 1.8g dose, and it is worth being exact about what a Stroop task measures, because it is not reaction time. The Stroop presents colour words printed in conflicting ink, the word red in blue ink, and asks for the ink colour, so that the measure is response inhibition, how quickly a person overrides the automatic reading of the word to report the colour; its score is the extra time the conflict costs rather than the base speed of the response, and a faster Stroop means a smaller conflict cost rather than a quicker reaction. The result was a single time point after a single dose, it was not replicated after four weeks of daily capsules against placebo in the same study, and the authors read it as a signal to test rather than a finding, which is what a pilot's one positive among several measures usually is. So the mushroom's reaction time evidence is zero studies, with one adjacent result on a different task that did not last.
There is also no mechanism by which it could be expected to move the number in the minutes or hours a reaction time test runs over. The five levers all act on arousal or on the speed of the nervous system's signalling: sleep and caffeine through the adenosine and arousal systems, alcohol as a depressant, dehydration through blood volume and attention, age through conduction and processing speed. Lion's mane has no stimulant, no action on adenosine or any arousal receptor, no effect on conduction, and its one pharmacological story, a trophic protein signal over weeks in cultured cells, is not a story about milliseconds; it is caffeine free, which is the reason a capsule taken with water leaves the ruler catch exactly where it was while the same mushroom in a coffee blend shortens it by the coffee's amount. A lifter who wants a faster reaction this week has the five levers, and four of them are free: a consolidated night, which moves the number more than any substance, water through the session, no alcohol the night before, and caffeine at 100 to 200mg an hour before a session that needs it, kept to the sessions that need it so the tolerance does not eat the effect. The honest buy, for a lifter who wants the mushroom for the reasons the trials studied, is a capsule that does not claim to be one of the five levers because it has never been tested as one: the worked example, {FLLM}, a stated 5:1 fruiting body extract labelled 1500mg mushroom equivalent per capsule, 120 days for £15.49 at 13p, UK made, independently lab tested, caffeine free so that any change on the ruler is not its coffee, and claim-free so that the ruler is never asked to find what the trials never measured.
| What moves reaction time | Direction and size | Evidence | Lion's mane by comparison |
|---|---|---|---|
| Sleep loss | Lengthens it and multiplies lapses by the hour of debt; a week of six-hour nights reads like legal drunkenness | The vigilance task was built to measure it | Never tested on any vigilance or reaction measure |
| Caffeine | Shortens it by tens of milliseconds at 100 to 200mg within thirty to sixty minutes | Dozens of trials | Caffeine free; a mushroom coffee's faster catch is the coffee |
| Alcohol | Lengthens it from the first unit in a dose-related line | The basis of the drink-drive limit | No depressant action |
| Age | A few milliseconds a decade from the twenties | Population norms | No effect on conduction or processing speed shown |
| Dehydration | Slows it past about two per cent of bodyweight, reverses with water | Exercise physiology trials | No effect on blood volume |
| The sixty-minute Stroop | A smaller conflict cost after a single 1.8g dose; response inhibition, not reaction | One time point, one pilot, not replicated at four weeks | The only adjacent result, on a different task |
| The ruler on the bench | Catch at 15cm is about 175ms, at 20cm about 200ms; ten drops averaged | The physics of a falling object | Will show which lever is setting the number this week |
| The worked exampleOurs | Changes nothing on the ruler, by design | A stated 5:1 extract, 13p, caffeine free, no claim | Does not claim to be a sixth lever |
What to check on the label
- Run the ruler: ten drops, fastest and slowest discarded, written down Monday and Friday.
- Read the five levers first: sleep, caffeine, alcohol, age, water.
- Separate Stroop from reaction: response inhibition at sixty minutes, not replicated at four weeks.
- Expect nothing from the capsule: no stimulant, no arousal action, no reaction time study.
- Buy caffeine free: so any change on the ruler is never its coffee.
Our brand
The worked example: Futuro Labs Lion's Mane
Futuro Labs Lion's Mane: 1 capsule daily of 5:1 fruiting body extract, labelled 1500mg mushroom equivalent (about 300mg extract), 120 capsules for £15.49, 120 days at 13p a day. Vegan HPMC shell, UK made under GMP and BRC, independently lab tested, caffeine free. Lion's mane holds no authorised UK health claims; this site describes its small studies as studies.
- Extract
- fruiting body, 5:1
- Per capsule
- 1500mg mushroom equivalent
- Serving
- 1 capsule a day
- Bottle
- 120 capsules, 120 days
- Price
- £15.49 (13p a day)
- Capsule
- HPMC vegan shell, size 00
Questions people also ask
Does lion's mane improve reaction time?
There is no evidence either way, because no human study of lion's mane has measured simple reaction time: the sixteen-week trial in older adults used a cognitive scale, the cookie study used mood questionnaires, and the young-adult pilot ran a Stroop task, which measures response inhibition rather than reaction, finding a faster score at sixty minutes after a single 1.8g dose that was not replicated after four weeks of daily use; the mushroom has no stimulant or arousal action by which it could be expected to move the number, and a capsule taken with water leaves a ruler-drop catch where it was.
How do I test my own reaction time at the gym?
With a 30cm ruler and a friend: they hold it vertically with the zero between your open thumb and forefinger, drop it without warning, and you read the centimetre mark where you caught it, which converts by the physics of a falling object to about 143 milliseconds at 10cm, 175 at 15cm, 200 at 20cm and 225 at 25cm; average ten drops with the fastest and slowest thrown out, write the number down, and repeat on the same day of the week at the same time, since the number moves with sleep, caffeine, alcohol and hydration before it moves with anything in a capsule.
What is a normal reaction time?
About 150 to 250 milliseconds for a simple visual stimulus in a healthy adult, a little faster for a sound, lengthening by a few milliseconds a decade from the twenties so that a forty-year-old lifter sits within the healthy range and a sixty-year-old is measurably slower; in a laboratory the psychomotor vigilance task adds a count of lapses, responses slower than 500 milliseconds, which is where sleep loss shows first and which a week of six-hour nights multiplies to the profile of a legally drunk person.
Why did lion's mane speed up the Stroop test in one study?
The Stroop presents colour words in conflicting ink and asks for the ink colour, so its score is the extra time the conflict costs, a measure of response inhibition rather than of base reaction speed; the young-adult pilot found that cost smaller at sixty minutes after a single 1.8g dose, at one time point among several measures, and did not find it after four weeks of daily capsules against placebo, which the authors read as a signal to test rather than a finding; a single positive at one time point in a pilot is the usual shape of chance, and nothing in the mushroom has a route to a change in minutes.
What actually shortens reaction time before a session?
The five levers with evidence, four of them free: a consolidated night, which moves the number more than any substance and removes the lapses that sleep debt multiplies; water through the session, since dehydration past about two per cent of bodyweight slows it; no alcohol the night before, since it lengthens reaction from the first unit; and caffeine at 100 to 200mg thirty to sixty minutes before, kept to the sessions that need it so that daily use does not build the tolerance that eats the effect; age is the fifth and is not a lever.
Sources
- The ruler-drop reaction time test: catching a dropped ruler between finger and thumb and converting the distance fallen to time gives a simple visual reaction time around 150 to 250 milliseconds in healthy adults, correlates with laboratory measures, and is sensitive to sleep loss, caffeine and alcohol, making it a valid home instrument for tracking reaction time over weeks. PubMed record
- The psychomotor vigilance task literature: a simple reaction-time test of a few minutes is sensitive to sleep loss and fatigue and is used in sleep research and occupational settings as an objective measure of alertness. PubMed record
- The caffeine and attention literature: meta-analyses and decades of trials report improved reaction time, vigilance and attention after ordinary caffeine doses. PubMed record
- The sleep and cognition literature: sleep restriction impairs attention, working memory and learning in a dose-dependent manner, and sleep extension restores them, making sleep the largest modifiable input to day-to-day cognitive performance. PubMed record