Most conversations about anxiety circle back to the same cast of characters — serotonin, cortisol, sleep debt, screen time. All of them matter. But a quieter character has been sitting in the back of the room for years, and new research just pulled it under the stage lights: choline.

A recently published meta-analysis found that people living with anxiety disorders consistently show lower levels of choline-containing compounds in the brain compared to people without anxiety. That's a striking pattern, and it opens up a different way of thinking about what chronic worry actually does to the organ doing the worrying. It also quietly intersects with something anyone considering plant medicine or a psychedelic retreat should probably know — because what you bring to a ceremony, nutritionally and neurologically, shapes what you get out of it.

What the Study Actually Found

The researchers pulled together previously published human studies that used proton magnetic resonance spectroscopy — a brain-imaging technique that reads chemical signatures from living tissue. The participants spanned several diagnoses: generalized anxiety disorder, panic disorder, social anxiety, OCD, and PTSD. A fairly wide net.

One finding kept surfacing across the data. People with anxiety disorders had lower concentrations of choline-containing compounds in the cortex — the outer, wrinkly layer of the brain that handles decision-making, emotional regulation, and the kind of higher-order thinking we rely on when we're trying not to spiral. In the higher-quality studies, the gap averaged about 8%. That isn't trivial.

The researchers called this a “transdiagnostic” finding, which is a fancy way of saying it showed up across different anxiety conditions rather than belonging to any single one. They also noted lower levels of N-acetylaspartate, a compound often used as a marker of healthy, functioning brain cells. Two signals pointing in the same direction.

Why Choline Matters More Than Most People Realize

Choline is an essential nutrient — meaning your body can't produce enough of it on its own, so you have to eat it. It's a precursor to acetylcholine, a neurotransmitter deeply involved in memory, attention, learning, and mood. It also helps maintain the integrity of cell membranes, which is a bigger deal than it sounds. Membranes are how brain cells talk to each other.

When imaging researchers talk about “choline-containing compounds,” they're measuring metabolites tied to cell membrane turnover. Translation: how actively your brain cells are repairing, maintaining, and communicating. Low readings in those compounds suggest the machinery isn't firing on all cylinders.

Here's the part worth sitting with. Chronic stress — the kind that defines life for someone with an anxiety disorder — appears to burn through choline faster than the brain can replenish it. Stress hormones alter how your brain uses and recycles the nutrient. A nervous system stuck in fight-or-flight mode is, in effect, running a metabolic deficit. Over months and years, that deficit compounds.

Does Low Choline Cause Anxiety, or Does Anxiety Cause Low Choline?

This is the question anyone with a skeptical bone in their body will ask, and the honest answer is: we don't know yet. Correlation isn't causation. It's entirely possible that anxiety depletes choline, that low choline worsens anxiety, or that both are true in a feedback loop that gets harder to interrupt the longer it runs.

What the study does suggest is that nutrition and mental health aren't separate conversations. The brain is a physical organ. It needs raw materials. When those materials run low, the symptoms we label as “psychological” may partly reflect a biochemistry that's out of balance.

None of this means popping choline supplements will fix anxiety. It won't. But it does mean that if you're carrying a chronic anxiety load, your diet is quietly doing work in the background — for you or against you.

Where Plant Medicine Fits Into This Picture

If you're reading this on a site about ayahuasca and psychedelic retreats, you probably already suspect what I'm about to say. The nutritional state you walk into a ceremony with matters. The traditional ayahuasca dieta — restricting salt, sugar, processed foods, pork, alcohol, and often sex and screens for days or weeks beforehand — isn't just ritual theatre. It's a reset. It lightens the load on a nervous system that's been running hot, and it gives the brain a cleaner baseline from which to do difficult work.

Many people arrive at ayahuasca, psilocybin, or ibogaine retreats precisely because anxiety, trauma, or depression haven't yielded to anything else. If their brains are already running a nutritional deficit — and the research increasingly suggests many anxious brains are — then skimping on the preparation phase is like trying to run a marathon on three hours of sleep. You can do it. You just won't get the result you came for.

Experienced facilitators know this. The good ones talk about diet, hydration, and nervous-system regulation weeks before you set foot in the ceremony space. The less experienced ones hand you a kombucha and wish you luck. Choose accordingly.

Food Sources That Actually Deliver Choline

If you want to shore up your choline intake without reaching for a bottle, food does the job well. The best sources are concentrated and recognizable:

• Eggs — one of the richest sources, with roughly 147 mg of choline in a single large egg (the yolk does most of the work).
• Fatty fish like salmon, mackerel, and sardines — a double hit of choline and omega-3s, which independently support brain health.
• Soybeans, lentils, and other legumes — the strongest plant-based options.
• Cruciferous vegetables — broccoli, cauliflower, and Brussels sprouts contribute smaller amounts but add up with regular eating.
• Liver — if you can stomach it, organ meats are nutritional powerhouses for choline and much else.

The daily adequate intake sits around 425 mg for women and 550 mg for men. Most people in Western countries fall short, and vegans or vegetarians who don't deliberately include legumes and cruciferous veg can run particularly low.

The Honest Takeaway

Anxiety is complicated. It has roots in genetics, early experience, nervous-system patterning, trauma, relationships, and yes — biochemistry. The choline finding doesn't rewrite that picture. It adds a layer to it. One more variable that quietly influences how your brain feels when it wakes up in the morning.

If you're actively working on anxiety — whether through therapy, medication, meditation, breathwork, or a plant-medicine journey — the nutrient side of the equation deserves a seat at the table. Eat the eggs. Eat the fish. Prepare properly if you're heading toward a ceremony. And remember that healing, especially the kind that lasts, tends to happen on multiple fronts at once rather than through any single magic bullet.

For readers who want to go deeper into the preparation side of this work, a range of curated psychedelic and plant-medicine retreats — many of which take dietary preparation seriously — can be browsed on our marketplace here. Whatever path you choose, give your brain the raw materials it needs. It's doing more work than you can see.