Your nervous system is built and run on what you eat. The chemicals that keep you calm and focused are made from nutrients. A shortfall in any of them affects how you feel. This post covers the foods and nutrients that support a calmer nervous system in women over 40. It then moves on to the nourishing herbs that belong alongside them.

• Your calming brain messengers, such as serotonin and GABA, are built from nutrients in food.
• Magnesium supports a calmer nervous system, and many women take in less than they need.
• Omega-3 fats from oily fish have the clearest evidence for easing anxiety.
• Protein and the B vitamins give your body the raw materials to make those messengers.
• Big swings in blood sugar can feel like anxiety, so meals that keep it level help.
• Much of this is made and absorbed in your gut, so fibre and fermented foods matter.
• Oats, nettle and lemon balm are foods and nourishing herbs at the same time.

Food and herbs exist on a continuum. Some plants are foods by any measure, some are daily tonics, and a few are closer to medicines. This piece begins with the everyday nutrients your nervous system needs. It then moves along to the nourishing herbs that belong in the same conversation.

Food does not replace the other influences, such as sleep, stress and hormones. It works alongside them. For many women, though, food is the part they have the most direct say over. It is also the easiest to change from one day to the next.

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Magnesium takes part in hundreds of reactions in your body, and several of them govern how your nerves fire and settle. When magnesium is low, your nerves fire more readily than they should. That is part of why the mineral matters for tension and for sleep.

In a period of stress your body uses magnesium faster and loses more of it in urine. So demand rises at exactly the time intake often drops.

Studies of magnesium for anxiety are mostly small and mixed. Several of them point in a helpful direction. And, a review of the trials found the strongest signals in people who were anxious or depleted to begin with. For low mood, a 2023 review of seven trials found magnesium lowered depression scores. Alongside this, many people take in less magnesium than recommended, so a low intake is common rather than rare.

Magnesium is found in dark leafy greens, nuts and seeds such as pumpkin seeds and almonds, beans, wholegrains and good quality dark chocolate. Building these into your usual meals is a sensible first move for anyone who feels tense and worn down. It is often where I start in clinic.

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Much of your brain is fat, and the omega-3 fats EPA and DHA are part of its structure. They also help to calm the low-grade inflammation that runs alongside long periods of stress. Both of those jobs matter for how your nervous system copes.

A 2024 review of 23 trials looked at omega-3 and anxiety. Around one gram a day was linked to a moderate reduction. The clearest results came from forms rich in EPA.

The richest source is oily fish, such as salmon, mackerel, sardines and herring. Two portions a week is a reasonable aim. Plant foods such as walnuts, flaxseed and chia contain a shorter form your body converts less efficiently. So they help to top up rather than to replace the fish.

Protein matters here because those calming chemicals are built from it. Serotonin, one of the main ones, is made from tryptophan, an amino acid found in protein. That conversion needs vitamin B6 to work, and B6 is a cofactor for making serotonin and dopamine. Folate and B12 do a related job, keeping a compound called homocysteine in check. That matters for both mood and memory as you get older.

The supplement trials are mixed. A review of 16 trials found B vitamins helped mood most clearly in people who were low to begin with. The benefit was smaller in those already well supplied. So topping up a low level is where the gain lies.

Include some protein at each meal, from eggs, fish, poultry, beans, lentils or dairy. B6 is found in fish, poultry, bananas and potatoes. Folate is found in leafy greens, beans and pulses. B12 comes almost entirely from animal foods. If you eat little or none, it is worth getting your level checked.

Your brain runs mostly on glucose, so the rises and falls in your blood sugar affect how you feel. After a sugary or refined meal eaten on its own, blood sugar rises quickly and then falls. That fall prompts a release of adrenaline and cortisol. It can feel like a racing heart, a short temper or a wave of anxiety.

As oestrogen falls through the years around menopause, blood sugar can become a little harder to keep level. That is one reason these swings can feel more noticeable than they used to.

Over the longer term the pattern matters too. A large study found that bigger swings in blood sugar were linked to higher rates of low mood and anxiety, even in people without diabetes.

Pair carbohydrate with protein, fat and fibre. So toast becomes toast with eggs, and fruit is eaten with a handful of nuts. Starting the day with protein rather than sugar alone smooths out the rises and falls that follow later in the day. Not skipping meals when you are busy helps as well.

Your gut and brain are in constant contact, in both directions. They communicate along the nerves and through the chemical messages your gut bacteria send. Those bacteria help to produce some of the same compounds involved in mood. And, they depend on what you feed them. A large share of the body’s serotonin is made in the gut. Most of it acts locally rather than in the brain.

Probiotics may be beneficial here. A 2025 review of 23 trials found they reduced low mood, and more moderately anxiety. The effect varied by the strain used.

For most women, the everyday version of this is food rather than a supplement. Fibre from vegetables, pulses, wholegrains and fruit feeds those bacteria. In turn, they make short-chain fatty acids, which help to calm inflammation. Fermented foods such as live yoghurt, kefir and sauerkraut add live bacteria to the mix. If changes through menopause have affected your gut health, this part is worth extra attention.

Oats

The porridge in your cupboard and the milky oat tincture a herbalist uses are the same plant at different stages. In herbal medicine, oats are classed as a nervine trophorestorative. That means a plant traditionally used to nourish and restore the nervous system. Oats are also rich in calcium and magnesium. And, they work slowly with regular use rather than all at once.

Nettle

Once cooked or steeped, nettle loses its sting. It becomes one of the more nourishing plants you can eat or drink. Nettle leaf is rich in iron, magnesium and calcium. It has been eaten as a food and drunk as a spring tonic for centuries. A daily infusion is an easy way to top up the minerals a frazzled nervous system draws on.

Lemon balm

This member of the mint family has a soft lemon scent and grows readily in a British garden. The leaves make a pleasant tea. Lemon balm has more behind it than tradition alone. A 2021 review of clinical trials found it reduced anxiety and improved mood. The trials so far are small.

The stronger herbs

Further along are the stronger nervines, such as skullcap, passionflower and St John’s wort. These are closer to medicines than to foods. They are chosen to suit you rather than picked off a shelf. A herbalist matches the herb to the person, which is the opposite of a trial’s one fixed dose for everyone. So a trial can only ever show part of what a plant does.

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From there, the nourishing herbs are an easy next step. Oats, nettle and lemon balm are close to food and gentle to use. The stronger herbs have more behind them, and they are chosen with more care and ideally with guidance.

If any of this sounds like it might be helpful, a personalised consultation can look at the whole picture. It can build support around your own situation.