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Verbal Fluency Improvement

Verbal Fluency Improvement describes better performance on tasks that ask a person to generate words, reflecting language-function performance. It may be assessed through verbal fluency tests or by measuring changes in the number of words produced.

Learn how Verbal Fluency Improvement is framed as a mind-related effect.

These are research findings, not promises. Most options have little evidence, and results differ from person to person.

What may help

What studies found for each option, best evidence first.

6 options:1 good evidence4 not enough evidence1 personal stories only

  • Tai ChipracticeGood evidence it helpsSize of effect: Not known

    Good human studies found a benefit, and they mostly agree. This is about what studies measured, not a cure.

    All 3 studies with a clear result found a benefit. Strongest study: a pooled analysis of several trials.

    Pooled analyses whose study designs were not recorded found higher language-test scores with Tai Chi; one reported an MD of 2.70 in 2024, and another found an MD of 0.90 among 846 older adults in 2025.

    Open the Tai Chi page
  • PilatespracticeNot enough evidence

    Too few or too small studies to know if it works.

    The one study found a benefit. Strongest study: a randomized controlled trial.

    Open the Pilates page
  • Hatha YogapracticeNot enough evidence

    Too few or too small studies to know if it works.

    The one study found a benefit. Strongest study: a randomized controlled trial.

    In an RCT with 82 participants, mean total-FAS increased by +5.0 words at 12-week follow-up compared with baseline.

    Open the Hatha Yoga page
  • Focused Attention MeditationpracticeNot enough evidence

    Too few or too small studies to know if it works.

    The one study found a benefit. Strongest study: a randomized controlled trial.

    A randomized trial in healthy participants found a small effect of meditation on verbal fluency, and suggestions could modulate that effect.

    Open the Focused Attention Meditation page
  • Forest Bathing (Shinrin-yoku)practiceNot enough evidence

    Too few or too small studies to know if it works.

    The one study found a benefit. Strongest study: a non-randomized trial.

    A quasi-experimental study involving 33 people reported a change in language performance.

    Open the Forest Bathing (Shinrin-yoku) page
  • Red Light Therapy (Photobiomodulation)practiceOnly personal stories

    Only people's own stories online. No study has tested it.

    Based on one study.

    Open the Red Light Therapy (Photobiomodulation) page

The expert view shows every study, dose protocol and source.

What may help

Linked to improving it6 listed

Start here

Highest probability, strongest evidence

  1. PracticesTai ChiCertaintyHighSourceRCT3 other sources

    Pooled analyses whose study designs were not recorded found higher language-test scores with Tai Chi; one reported an MD of 2.70 (95% CI: 2.63 to 2.76) in 2024, and another found an MD of 0.90 (95% CI: 0.38 to 1.41) among 846 older adults in 2025.

    Who was studied

    • People with a condition

    Study result

    The verbal fluency test, assessing language function, showed significantly higher scores in the tai chi group, with no heterogeneity observed (MD: 2.70; 95% CI: 2.63 to 2.76; p<0.00001; I^2=0%)

    Open Tai Chi
    →
Low probability(5)
  1. PracticesPilatesCertaintyLowSourceClinical1 other source

    A 2020 trial of 107 participants who had menopause found higher scores on the Isaacs test after Pilates training (t (54) = −10.46, p < 0.001, Cohen’s d = 0.70).

    Who was studied

    • Healthy people
    • Menopause

    Study result

    higher (better) scores were obtained in the Isaacs test after the Pilates training program: t (54) = −10.46, p < 0.001, Cohen’s d = 0.70

    Open Pilates
    →
  2. PracticesHatha YogaCertaintyLowSourceClinical1 other source

    In an RCT with 82 participants, mean total-FAS increased by +5.0 words at 12-week follow-up compared with baseline (p=0.002).

    Who was studied

    • People with a condition

    Study result

    At 12-week follow-up, compared to baseline, there were increases in mean total-FAS in the yoga (+5.0 words, p=0.002)

    Open Hatha Yoga
    →
  3. PracticesFocused Attention MeditationCertaintyLowSourceClinical1 other source

    A randomized trial in healthy participants found a small effect of meditation on verbal fluency, and suggestions could modulate that effect.

    Who was studied

    • Healthy people

    Study result

    It also indicates that suggestions can modulate the small effect of meditation on verbal fluency.

    Open Focused Attention Meditation
    →
  4. PracticesForest Bathing (Shinrin-yoku)CertaintyLowSourceClinical1 other source

    A quasi-experimental study involving 33 people reported a change in language performance (p<0.001).

    Who was studied

    • People with a condition

    Study result

    language (p<0.001)

    Open Forest Bathing (Shinrin-yoku)
    →
  5. PracticesRed Light Therapy (Photobiomodulation)CertaintyLowSourceAnecdotal1 other source

    This effect was mentioned in 2 of 72 YouTube videos discussing it.

    →

Practices compared

Practices with at least one trial of their own for this goal. Ranked by how sure the evidence is, then effect size.
PracticeHow sureEffect sizeOwn trialsWhat worked in trials
Tai ChiCertaintyHighSourceRCT3 trials or pooled analyses3×/week · 28–29 weeks
Focused Attention MeditationCertaintyLowSourceClinical1 trial or pooled analysis
Forest Bathing (Shinrin-yoku)CertaintyLowSourceClinical1 trial or pooled analysis
Hatha YogaCertaintyLowSourceClinical1 trial or pooled analysis
PilatesCertaintyLowSourceClinical1 trial or pooled analysis

What worked in trials: From the smallest to the typical amount in the trials that found this benefit. Not the most anyone did, not a target and not a limit.

How to read the evidence

Evidence tier — overall strength of the evidence for the whole compound

  • StrongWell established — backed by strong, consistent human research.
  • ModerateSome genuine support, but mostly from small or lower-quality studies. Promising, not proven.
  • PreliminaryEarly-stage evidence — a promising hypothesis, not an established effect yet.
  • LimitedVery limited evidence — treat this as a hypothesis, not proof.
  • InsufficientNot enough good evidence to draw conclusions yet.

Certainty — how sure we can be that the effect is real

  • Very highVery sure — strong, consistent evidence
  • HighFairly sure — consistent evidence from good studies
  • MediumModerately sure — new studies could change this
  • LowNot sure — little or mixed evidence
  • Very lowVery unsure — almost no usable evidence

Source — where the data comes from

  • Meta-analysisPooled analysis of many trials — the strongest evidence
  • RCTRandomized controlled trial — a strong human study design
  • ClinicalA human clinical study
  • Reference knowledgeFrom general health-science or pharmacology references, not a study of this exact claim
  • Animal researchStudied in animals, not humans
  • Community reportsAggregated user reports — anecdotal signal, not evidence
  • TheoreticalMechanism-based reasoning, not yet tested

Study grade — quality of each underlying study (A best, D weakest)

  • AHigh-quality — strong, consistent human trials
  • BGood — solid evidence with some limitations
  • CModerate — limited, small, or mixed-quality studies
  • DWeak — preliminary, indirect, or animal-only

Confidence — how strongly the sources back a finding

A 0–100 score from study quality and agreement

Most supplement evidence is graded C–D. Read it as preliminary signal, not proof.

Full write-up

What is it

Verbal Fluency Improvement describes better performance on tasks that ask a person to generate words, reflecting language-function performance. It may be assessed through verbal fluency tests or by measuring changes in the number of words produced. This outcome concerns performance on a specific language task, not a broad claim about every aspect of cognition or communication. Tai Chi, L-Theanine, Flaxseed Oil, and Glycine are examples studied in relation to it, with differing evidence strength and study contexts.

How interventions help

Interventions associated with this outcome differ substantially in format and timing. Tai Chi is the clearest activity-based approach in the available findings: participants with a clinical condition achieved higher scores on a verbal fluency test, which assesses language function. This result concerns performance on that measure and should not automatically be interpreted as a broad improvement in every aspect of language ability.

Supplement-based findings span shorter and longer schedules. L-Theanine was studied at 200 mg/day for 4 weeks, with an onset category of days and no requirement for daily use. Flaxseed Oil was assessed over 12 weeks at 2.2 g ALA/day, with verbal fluency measured in words. Glycine was evaluated over 24 weeks, required daily use, and was associated with persistence after stopping for weeks. These schedules are not interchangeable: a result observed after a brief period may reflect a different pattern from one requiring continued use over several months.

The remaining signals are less suitable for drawing firm conclusions about how to improve verbal fluency. Some come from a review or isolated personal reports rather than direct human outcome testing. Reports describing immediate effects, including those associated with several interventions, indicate when people said they noticed a change, not whether testing confirmed an improvement. Overall, the findings support treating verbal fluency as a specific measured outcome and considering intervention type, duration, and continuity separately rather than assuming that all approaches work in the same way.

Choosing guidance

For readers looking for evidence from human studies, Tai Chi, L-Theanine, and Flaxseed Oil are the most relevant options listed. Tai Chi was studied in people with a clinical condition, while L-Theanine and Flaxseed Oil were studied in unspecified populations, so the findings may not apply equally to everyone. Tai Chi is also a non-supplement option, which may suit people who prefer an activity-based approach rather than a product.

The studied options differ in how quickly an effect might appear and whether regular use was part of the research. L-Theanine was assessed over a shorter period, whereas Flaxseed Oil and Glycine were examined over longer periods. Glycine involved daily use and did not have human evidence, so its findings are less directly applicable to people. Omega-3 was reviewed across studies involving Alzheimer’s Disease and Mild Cognitive Impairment, but it should not be treated as interchangeable with evidence in healthy adults or in other conditions.

Anecdotal reports for options such as Caffeine, Creatine, Ginkgo Biloba, and MCT Oil can suggest what people notice quickly, but they do not establish that an option improves verbal fluency. They are therefore less useful when choosing on the basis of reliable human evidence. Bacopa Monnieri also has limited review evidence, with improvement reported in only one of three studies, illustrating why a promising mention does not necessarily indicate consistent results.

Diatelos provides general wellness information based on published research. It is not medical advice. Talk to a clinician before starting any new supplement or practice, especially if you have a health condition, are pregnant, or take medication.