REM sleep behavior disorder and Parkinson's: an early sign
What REM sleep behavior disorder and Parkinson's have in common: a 1,280-patient study, and new research on how the brain responds to the heartbeat.
Health, science and AI, with evidence
· Every claim with its source, and its limits stated plainly.
Can You Catch Up on Sleep on Weekends? What Studies Show
Can you catch up on sleep on weekends? See what a randomized trial and two large studies found about weekend recovery sleep, and its limits.
Creatine without exercise: does it build muscle?
Does creatine work without exercise? A 12-week trial in 64 adults aged 45 to 65 found gains in lean mass and strength, but exercise still did more.
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Insomnia and stroke risk: what a large new review found
Insomnia and stroke risk: a review of over 1.3 million people linked insomnia to a 26% higher stroke risk vs. those without it. What that means.
Popular claims checked against the evidence: myth, fact, or partly true.
How we rate evidence
Not every study is equally strong. Each post gets a five-step meter based on the type of study, not on how exciting the result is. How we work
- Opinion or anecdote
Expert opinion, anecdote or a single case: it can raise a question, but proves nothing.
- Cells or animals
Studies in cells or animals: useful to understand how, but results may not hold in people.
- Observational studies
Observational studies that follow people: they show a link, not that one thing causes the other.
- Clinical trial
A randomized clinical trial: it compares groups of people, and comes close to showing cause.
- Review of clinical trials
A systematic review of several clinical trials: the strongest evidence science can offer.
One evidence-based post every day
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