“Eating for your mood” sounds like a magazine promise. Eat blueberries. Feel better. Drink green smoothies. Lift your depression. These headlines arrive weekly, and most of them are technically supported by some study somewhere, and almost none of them tell you anything useful. What the research actually shows is more interesting — and stranger — than the version sold in listicles.

Start with a fact that most people don’t know: roughly 90 percent of the body’s serotonin is produced not in the brain but in the gut. The gut has its own nervous system, the enteric nervous system, which contains approximately 500 million neurons — more than the spinal cord. These two systems communicate continuously, in both directions, via the vagus nerve: a thick cable running from brainstem to abdomen that carries information upward as readily as it carries commands downward.

This is the gut-brain axis. The gut microbiome — the several trillion microorganisms living in your gastrointestinal tract — produces neurotransmitters, short-chain fatty acids, and signaling molecules that cross into circulation and influence brain function. What you eat changes the composition of that microbiome within 24 to 48 hours. Fiber from vegetables, legumes, and whole grains feeds the bacterial populations associated with lower systemic inflammation. Ultra-processed foods — high in refined starches, seed oils, and additives — feed the populations associated with higher inflammation. The link between chronic inflammation and depression is now robust enough that some researchers have proposed depression as, in part, an inflammatory disease. This is not alternative medicine. It is replicated across multiple large epidemiological studies and increasingly understood at the mechanistic level.

Blood sugar and the anxiety no one explains

Here is something worth understanding if you experience anxiety: a significant drop in blood sugar triggers the release of cortisol and adrenaline — the counterregulatory hormones that exist to drive glucose back up. These hormones produce physical symptoms. Elevated heart rate. Sweating. A sense of urgency or dread that appears from nowhere. In people prone to anxiety, this physiological state is nearly indistinguishable from the early stages of a panic response.

This matters because blood sugar drops are not evenly distributed across the day. They tend to occur when meals are skipped, when breakfast is only coffee, when lunch is pushed several hours late, or when large amounts of refined carbohydrates are consumed without fat or protein to blunt the glycemic rise and fall. The advice to eat regular meals is less about discipline than about preventing the hormonal cascade that amplifies anxiety. Stable blood glucose does not cure anxiety disorder. But it removes one significant and controllable driver of it — and that is worth acting on.

Why cooking itself is part of this

One of the more underreported findings in behavioral health research is that cooking — active engagement with preparing food, not merely consuming it — is associated with measurable reductions in depression scores. The mechanisms proposed are several: the behavioral activation of engaging in purposeful, sensory-rich activity; the sense of competence that comes from making something tangible; the focused attention cooking requires, which has structural similarities to mindfulness practice; and the downstream social effects of preparing food for others, or with others.

A study following adults through a cooking skills intervention found increases not only in cooking frequency but in self-reported life satisfaction and confidence. These are not trivial effects. They suggest that the kitchen is a meaningful environment — that how you spend the thirty minutes before dinner matters to your mental health separately from what you put on the plate.

What this asks of you

None of this requires a specific diet, a supplement protocol, or the elimination of anything. It does not require that you believe food is medicine or that your doctor is wrong. What it requires is an orientation: toward real ingredients, toward mealtimes that happen, toward cooking as an act you engage in rather than avoid.

That is what Simmerstate is built around — not claims, not cures, but a serious engagement with the evidence that food and mental wellbeing are connected, and a kitchen practice that takes that seriously.

For a detailed look at the research, visit our Food & Mental Health overview.