The Mura blog
Mental health, simply explained
Science-backed, plain-English writing on sleep, mood, nutrition, and the mind-body connection.
Mouth breathing and depression: one real link, and three that are oversold
The claim doing the rounds is that breathing through your mouth causes depression, by way of cortisol, oxygen and brain fog. One link in that chain is genuinely solid. The rest is mostly dental marketing. Here is which is which, and why the fashionable fix can be dangerous for exactly the people most drawn to it.
Read →Caffeine does not only delay sleep. It makes the sleep you do get shallower.
A review of 32 EEG studies spanning 1980 to 2026 found the same thing over and over: caffeine flattens the slow waves that make deep sleep deep, and speeds up the brain activity underneath. You can sleep your usual hours and still lose the part that does the repair. But the viral version of this finding drops the detail that changes what you should actually do.
Read →Your feed uses the same mechanic as a slot machine, and that is not a metaphor
Pull to refresh is a lever. The delay before your notifications load is not a bug. Variable reward schedules are the most powerful way known to psychology to keep a behavior going, and they were worked out on animals long before they were built into the thing in your pocket. Here is the mechanic, and here is what the evidence does and does not say about what it does to you.
Read →What causes depression? The honest version of the list.
Every article promises the causes of depression ranked by how common they are. That list does not exist, and the numbers in it are invented. Here is what the evidence actually supports, and what is worth ruling out first.
Read →The downward spiral is real. It also has a specific exit.
Depression shrinks what you do, which gives you less to feel good about, which shrinks it further. The way out of that circle is not waiting to feel better. It is one of the best evidenced treatments there is, and it is free.
Read →Short videos are linked to worse attention. Linked is doing a lot of work in that sentence.
A viral post says TikTok destroys your self-control and makes you live a worse life. The study behind it is real and it is large. What it measured is narrower, and two of its findings are the opposite of what everyone expected.
Read →The serotonin myth is over. That is not an argument against antidepressants.
A viral post says people were misled for decades about serotonin and antidepressants. Most of that is right. The conclusion readers draw from it does not follow, and that is the part that can hurt someone.
Read →An overcast day is still 50 times brighter than your living room. But what does it mean for your mood?
Your eyes lie to you about light. A well-lit room reads as bright, but at eye level it is around 100 lux, while a gray overcast midday outdoors runs into the thousands. Here is the real size of the gap, why you cannot feel it, and what the evidence says it does to mood.
Read →Microplastic, nanoplastic, and a credit card dose that may fuel your depression
The most repeated statistic about microplastics is wrong by a wide margin, and the reassuring number offered in its place does not survive either. What has actually been found in human tissue, including the brain, is more unsettled than either. Plus what the research does and does not say about mood and depression.
Read →Stressed cells burn 62% more energy
Columbia researchers kept human cells under chronic stress hormone for 250 days and measured the bill. The cells burned about 62 percent more energy, and aged faster for it. The number is real, and it is smaller than the internet thinks.
Read →Sleep: the most important things, ranked
Most sleep advice is a flat list of twenty tips, which hides the fact that the items differ in effect size by an order of magnitude. Here they are in order, with the reasoning for each placement.
Read →Ibogaine: the biggest addiction interrupter?
For interrupting severe opioid dependence, nothing else works the way ibogaine does. But interruption and long-term survival are different measurements, and the treatments that win each one are not the same.
Read →Can you reset your brain?
Ibogaine comes closer than anything else to what people mean by a neurochemical reboot, and unlike most claims in this space, the mechanisms are partly mapped. Here is what is actually established, what is still rodent work, and what proper screening changes.
Read →Hangxiety: why the morning after feels like dread, and what alcohol does to your gut
The anxiety that arrives with a hangover is not imagined and not just guilt. It is a measurable rebound in brain chemistry. The gut story is real too, but it is smaller than the internet suggests.
Read →“The focus is not on helping people”: what van der Kolk meant, and what we did about it
One of the biggest names in trauma psychiatry made a blunt claim about who mental health care is actually built to serve. It is worth taking seriously, and worth being careful with.
Read →Glyphosate, anxiety and mood: two independent studies, one oddly specific signal
A 2026 study found that glyphosate at legal exposure levels changed behavior in mice, and proved the gut was the route. An independent human study points at the same narrow target. The reassuring review, meanwhile, was funded by Bayer.
Read →Gluten, zonulin and “leaky gut”: what the research actually shows
The gluten-to-leaky-gut claim rests on real science, then takes a leap the evidence doesn’t support. Including one detail about the standard test that almost nobody mentions.
Read →How psilocybin rewires your brain, and whether the changes last
A single dose of psilocybin can trigger new brain-cell connections within hours. Here's what the neuroscience actually shows about how long that rewiring sticks around.
Read →Trauma is stored in the body, and talk therapy alone isn't always enough
Trauma isn't only a memory to discuss; it's a state your nervous system gets stuck in. That's why, for some people, talking about it doesn't fully resolve it, and what helps.
Read →Psychedelics and treatment-resistant depression: what the trials show
When standard antidepressants keep failing, psilocybin and ketamine are producing striking results in trials, sometimes after a single dose. Here's the evidence, and the caveats.
Read →Ibogaine and the opioid crisis: a controversial last resort for fentanyl
Ibogaine can interrupt opioid dependence and dramatically blunt withdrawal, but it carries serious, sometimes fatal cardiac risks. Why researchers are taking a fresh, careful look for fentanyl.
Read →MDMA-assisted therapy for trauma: revisiting the past, safely
In phase 3 trials, most people with severe PTSD no longer met the diagnostic criteria after MDMA-assisted therapy. Here's how it works, and where it stands with regulators.
Read →How sleep quality directly impacts your mood regulation
New research shows that even mild sleep deprivation reduces emotional resilience by up to 40%, and what you can do about it.
Read →The gut-brain axis: why what you eat shapes how you feel
Your gut produces 95% of your body's serotonin. Understanding this connection is the first step to lasting mood improvement.
Read →CBT techniques you can practice in under 10 minutes a day
Cognitive-behavioral therapy doesn't require a therapist's couch. These science-backed micro-exercises fit into any schedule.
Read →Why 20 minutes of walking outperforms most antidepressants
Meta-analyzes of 1,000+ studies confirm: consistent low-intensity movement is one of the most effective mood interventions.
Read →Cold exposure, cortisol, and the stress adaptation curve
Brief cold exposure trains your nervous system to handle stress more gracefully. Here's the mechanism explained simply.
Read →What your heart-rate variability reveals about your stress
HRV is one of the clearest windows into your nervous system. Here's how to read it, and gently train it higher over time.
Read →The 4-7-8 breath: a 90-second reset for acute anxiety
Slow exhales activate the vagus nerve and pull you out of fight-or-flight. A simple, evidence-backed technique you can use anywhere.
Read →Vitamin D, B12 and iron: the deficiencies that mimic depression
Low mood isn't always psychological. These three common deficiencies are routinely mistaken for depression, and they're easy to check.
Read →How EMDR-informed bilateral stimulation calms a stuck memory
Left-right cues gently tax working memory while you hold a difficult thought, softening its emotional charge. The science, made simple.
Read →Magnesium, omega-3 and the supplements with real mood evidence
The shelves are noisy, but a handful of supplements have genuine clinical backing for mood and sleep. Here's what the data actually supports.
Read →Saffron: the spice that rivals antidepressants in clinical trials
Multiple randomized trials found saffron extract as effective as standard SSRIs for mild-to-moderate depression, with fewer side effects. Here's the evidence.
Read →Teens with low iron: around twice the odds of an anxiety disorder
In a study of nearly 15,000 young people, adolescents with iron deficiency anemia had roughly twice the odds of an anxiety disorder, and about the same for depression. It takes a blood test that most of them never get.
Read →Sleep apnea quadruples the risk of dying early, and most people who have it do not know
In two cohorts followed for 18 and 20 years, people with moderate to severe sleep apnea died at roughly four times the rate of people without it. In the same population, 93% of women and 82% of men who had it had never been diagnosed. Here is what the numbers actually support, and how to check your own nights.
Read →The most common deficiency in the world, and why your blood test can still look normal
Nearly a quarter of the world is anemic, and the biggest cause is a shortage of iron. But the group worth worrying about are the people whose stores are already empty while their hemoglobin still reads normal, because the standard blood test measures the last stage of this and not the first.
Read →Mura AI review: what it actually does, and what it does not
Written by the people who build it, so weigh it accordingly. What is in the app, verified against the current build, what it cannot do, and the two features that are switched off because they do not work well enough to ship.
Read →I sold them life: a cliff, an angel, and up to 500 souls saved
He was a salesman who lived opposite a cliff in Sydney for nearly fifty years, and when people asked how he did it, he answered in the only language he had: I sold them life. The official count is 160. His family says 500. He had no training of any kind, which is either comforting or confronting depending on how you read it.
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