Concern
12 plain-language articles on cognition & mood — the physiology, the compounds researched for it, and what the evidence actually shows.
12 articles
The anxiety that medication doesn't quite reach
SSRIs have helped. Maybe a benzodiazepine has helped acutely. But neither has quite reached what you're actually experiencing. The edge is still there. The body still braces for nothing. The 3am wake-ups still come, the chest still feels tight on Sundays, and the anxiety has a physical quality your medication hasn't softened. If this describes you, the most likely explanation isn't that you need a different SSRI or a higher dose — it's that the mechanism producing your anxiety is operating in a system the SSRI doesn't reach.
Brain fog that comes and goes
Some days the words are there. Other days there's a half-second pause where the noun should be, the sentence reroutes around it, and you spend the rest of the conversation hoping no one noticed. Some weeks you read a paragraph three times before it lands. Then it lifts. The good days return. Then it comes back. Brain fog that comes and goes isn't random, and it isn't in your head in the dismissive sense. It's a real physiological state, and its on-off pattern is the most useful diagnostic clue it gives you.
Burnout isn't depression — and that's why antidepressants don't help
If you've been told you're depressed but the medication isn't reaching whatever this is, there's a reasonable chance the diagnosis is incomplete. What gets clinically labeled as "treatment-resistant depression" in high-functioning, chronically overloaded people is often a separate physiological state with its own mechanism — and the standard depression playbook doesn't address it.
PTSD and the nervous system that won't stand down
Years after the event, the body still flinches. Sleep is uneven. Loud noises produce a disproportionate startle. The system is on, even when nothing's happening. Therapy has helped, sometimes substantially, but the physical baseline hasn't fully rejoined the people you live with. This is what trauma does at the level of physiology — and understanding that level is what lets you do something about the parts therapy alone hasn't reached.
Stress-driven migraine — the threshold problem
If your migraines have become more frequent in a difficult year, you've probably noticed that the triggers don't fully explain the pattern. The wine you've always had. The skipped meal you've always recovered from. The weather change that didn't used to register. The triggers haven't changed. What's changed is how close to the edge your system is sitting.
The brain fog that follows your cycle — the cognitive fluctuation no one mapped for you
There are days in the month when your mind is a precision instrument. You write fast, you hold the thread of a conversation without losing it, you do mental math in real time and the answer is there before you need it. You feel, in some basic cognitive sense, like yourself. And then there are other days — often predictable days, often a particular cluster of days — when you sit down to write the same kind of thing and the words are not there. Not gone exactly, just unavailable, like a file you know exists on a server you can't currently reach. Someone asks you a question in a meeting and you know the answer but it takes a beat too long to surface. You lose the noun in the middle of the sentence. You read the same paragraph three times and it doesn't stick. And the thing that makes this specific kind of awful is that you know what your mind is capable of, because you experienced it last week.
The kynurenine pathway — how chronic inflammation affects cognition and mood
You come down with a serious infection — flu, pneumonia, something that puts you in bed for a week. What nobody prepares you for is the cognitive and emotional texture of the illness: the flat affect, the inability to concentrate, the deep fatigue that feels different from ordinary tiredness, the mood that drops in ways a headache alone can't explain. You've been told this is your immune system fighting the infection. What you haven't been told is that a significant portion of what you're experiencing in your brain is a direct downstream consequence of what the immune system is doing to a single amino acid.
NAD+ in cognitive function and neuroprotection
You notice it around mid-morning, maybe an hour or two after waking. The thoughts aren't quite connecting the way they used to. Words that were automatic are now effortful, just slightly — not the dramatic forgetting of a medical event, just a very quiet dimming. You'd dismiss it as tiredness or age if it weren't so consistent, if it weren't there even on the days when you slept well and ate well and did everything right. The cognitive baseline has shifted and the shift happened so gradually that you can't point to when it started. You just know it doesn't feel like before.
Restaurants used to be fine — when noise processing changes
You used to enjoy a busy restaurant. The noise was part of it — the hum of other conversations, the kitchen sounds, the social density of a room where everyone had somewhere to be. Now you sit down in that same kind of room and something is different. Following the conversation across the table requires an effort that didn't use to be required. You find yourself leaning in more, concentrating harder, asking people to repeat things. By the time the main course arrives you're running a low-level effort expenditure that has nothing to do with the food or the company. By the end of the evening you're tired in a way that can't quite be attributed to the late hour.
The headache after screens — what your after-work temple pain is signaling
By four in the afternoon there's a dull pressure starting at your temples, the kind that feels like it's coming from just behind the eyes and slowly tightening a band across the front of your head. The eyes themselves are dry and faintly burning, gritty when you blink, and the screen you've stared at through six hours of video calls and documents has taken on a slightly swimmy quality that makes you want to rub them. You close the laptop at the end of the day and the headache doesn't close with it — it rides home with you, settling in for the evening, a small tax levied for the work you just did with your eyes.
The mood after alcohol that's different from how it used to be
You used to drink two glasses of wine at a dinner party and feel pleasantly social for a few hours and wake up fine. That is no longer what happens. What happens now is the dinner party is fine, maybe genuinely enjoyable in the moment, and then the next day there's a shadow over everything — a low-grade anxiety that's out of proportion to anything you can point to, a flatness that takes the first half of the day to lift, sometimes the second half too. Occasionally it doesn't fully lift by day two. The night itself: broken sleep, a heart that seems to be working harder than it should be at three a.m., something you might describe as a low-level internal buzzing that wasn't there in your 30s. The red wine that you loved for years now sometimes produces a flush and a headache that arrives before you'd expect it. You've tried switching to white wine, to better wine, to less. The advice you consistently receive is: drink less. Which is accurate. And which doesn't explain why the same amount now produces a different consequence than it did before.
The vertigo spells you can't explain
It comes without warning, or it comes when you turn a certain way — roll over in bed, look up at a high shelf, turn your head quickly to the right. The room tilts. Not metaphorically. The room actually tilts, spinning or shifting in a way that has no relationship to any movement you've made, and for a few seconds or a few minutes the floor is unreliable. Sometimes there's nausea. Sometimes there's a cold sweat. Sometimes it passes in thirty seconds and you're left standing very still, waiting to be sure it's over. Sometimes it doesn't pass quickly and you end up sitting on the floor of a grocery store waiting for the world to settle. You describe this to your doctor and they say it sounds like benign positional vertigo, give you a handout about the Epley maneuver, and that's the end of it.