What the evidence actually says

One question per page, read against the research, with a plain verdict on how much weight it holds.

7 questions · 6 capabilities · 22 sources read and checked · 3 verdicts the evidence firmly supports

Does manifestation work, and what does the science actually support?The mechanism claimed by law of attraction has no supporting evidence. Two related techniques underneath the popular practice do: pairing a wish against the real obstacle, and deciding in advance when and where you will act, improved goal attainment across 24 comparisons and nearly 16,000 people. Visualising the outcome alone is the part that fails.

Strength of evidence

  1. traditional
  2. emerging
  3. informed
  4. established
2 sources checked · reviewed 17 August 2026
Does brain training work?

Strength of evidence

evidence-based

What does the evidence say about loneliness and lifespan?

Strength of evidence

evidence-based

Every brief carries its weight on the page

Nothing here is graded by how much we like it. Each question is read against the studies, then labelled with how much the evidence will actually bear.

evidence-based
Supported by controlled trials or meta-analysis, replicated by more than one research group.
evidence-informed
Real signal in the research, with small studies, small effects, or few controls holding it back.
emerging
Early findings that look promising and need better studies before anyone can be sure.
traditional
Long practised in a living tradition, with limited clinical study behind it.

Three more labels cover ideas whose meaning sits outside experimental trials. This keeps philosophy and metaphor in their proper category.

How we grade the evidence

Browse by capability

Six capabilities of mental longevity. Open one to read every brief in it.

Cognitive clarityFocus, attention, and memoryEmotional regulationStress and calmPsychological flexibilityLearning and adaptingIntentional behaviorHabits and follow-throughSocial connectionRelationships and purposeRestoration capacitySleep, rest, and recovery

Latest briefs

Does non-sleep deep rest actually work?The practice has a real effect on how rested you feel, and measurable changes show up in brain activity and in stress hormones. The effects reported in the best controlled trial are small, most other studies are small and uncontrolled, and the term NSDR itself has no research base of its own.

Strength of evidence

evidence-informed

5 sources checkedWhat do the studies actually show about binaural beats?Listening to binaural beats appears to shift anxiety and some cognitive measures, with the best pooled estimate landing at a medium effect. The mechanism usually offered for it, that the beats pull your brainwaves into step, holds up poorly under review. Most trials are small and vary so widely in method that pooling them is difficult.

Strength of evidence

emerging

4 sources checkedWhich brain health supplements have real evidence behind them?Two hold up modestly. A daily multivitamin produced a small memory and cognition benefit across more than 5,000 people, and creatine shows a small effect on memory. Two of the most popular have been properly tested and failed: omega-3 produced no cognitive benefit in a 4,218 person trial, and ginkgo produced none across 3,069 people followed for six years.

Strength of evidence

evidence-informed

4 sources checkedDoes breathwork work, and what about the Wim Hof method?Short daily breathing practice has solid controlled evidence for mood and physiological arousal, and one exhale-focused technique outperformed mindfulness meditation in a randomised trial. The Wim Hof method genuinely dampens an induced immune response, in very small samples of healthy young men, where participants who expected it to work responded more strongly.

Strength of evidence

evidence-informed

3 sources checkedDoes manifestation work, and what does the science actually support?The mechanism claimed by law of attraction has no supporting evidence. Two related techniques underneath the popular practice do: pairing a wish against the real obstacle, and deciding in advance when and where you will act, improved goal attainment across 24 comparisons and nearly 16,000 people. Visualising the outcome alone is the part that fails.

Strength of evidence

evidence-based

2 sources checkedDoes brain training work?You improve at what you practise, substantially and reliably. Across 87 publications and 145 comparisons, that improvement did not carry over to intelligence, verbal ability, reading comprehension or arithmetic when measured against an active control group. Near transfer is real and useful. Far transfer has not been demonstrated.

Strength of evidence

evidence-based

1 source checked

What we mean by mental longevity

Mental longevity is the lifelong capacity to think clearly, regulate your inner state, adapt to change, keep learning, maintain meaningful connections, and live intentionally.

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