Mental decline can be reversed by diet

Thanks to a five-year collaboration with the nutritional therapist Alice Mackintosh, I am happy to report that my school run is now back to normal. I first went to see Mackintosh after becoming interested in harnessing the power of food to improve my own mental health, following two serious breakdowns in my 30s.

At the time of the first, in 1997, I was trying to combine working on a national newspaper with the demands of a young family. My husband Sebastian and I had two children under the age of three — Edward, two, and three-month-old George. One night I couldn’t sleep. But with the insomnia came some other alarming symptoms: my heart rate quickened, I felt sick, and my mind was racing. Was I having a heart attack? It turned out to be the start of an anxiety-fuelled depressive episode which saw me briefly hospitalised.

I had a second major episode in 2003, and was seriously incapacitated for 18 months. Both times I was treated mainly with drugs and therapy, and gradually, I began to recover. But it was at that point that I decided to investigate a holistic approach to good mental health. I didn’t want to succumb to a third breakdown if I could possibly avoid it.

I was introduced to the healing powers of a change in diet when I took George, by now aged nine, to a nutritional therapy clinic in west London to treat his eczema. I was delighted when his angry red skin began to heal, after we reduced the amount of dairy and wheat in his diet. But it wasn’t until much later that I wondered if food could boost my mental health, and I sought out Mackintosh, who was also interested in the link between food and mood.

I already knew that my mind could become foggy when I felt stressed, and a psychiatrist told me that a person’s IQ can drop by 30 points when they are suffering with anxiety. Over the years there have been times when antidepressants and sleeping pills have left me muddled and forgetful. Might changing my diet help boost my mental clarity?

Our brains consume about 300 calories every day, and the same again at night. This means that good nutrition is extremely important for our mental health and our ability to remember things — names, for example. Mackintosh taught me that a diet containing processed fats, sugar and preservatives may be setting us up for the kind of chronic inflammation that scientists and doctors think may be at the root of low mood, anxiety and depression, as well as poor cognitive function. Armed with this information, I resolved to eliminate such foods from my life. Instead, I focused on buying “real foods” for my family, especially vegetables, which studies have shown can boost our mental health.

One, by academics at Arizona State University in 2010, found that a vegetarian diet is associated with good moods. A 2012 German study suggested that plant antioxidants help neutralise free radicals in our bodies, which have been linked to depression.

As a family, we started to eat more eggs, unprocessed carbohydrates, nuts, seeds and natural fats such as butter and olive oil. We increased the amount of probiotics and fermented foods such as natural yoghurt, sauerkraut and miso paste we consumed to encourage healthy gut flora. Some scientists now think that stress influences our gut bacteria, which in turn can have an impact on our mental clarity. I also boosted the amount of beetroot I eat. This contains nitric oxide, a compound that improves blood flow by relaxing the vessels. There are compelling studies about the mind-sharpening effects of berries and seafood, too.

Most importantly, we ate calmly and mindfully, using the 70 recipes that Mackintosh and I developed together, based on more than 140 nutritional studies. In addition, Mackintosh taught me that we should drink more water if we want to think straight. “Dehydration is a major cause of brain fog, as well as low mood and lethargy,” she says. I’ve found keeping a jug on the kitchen table helps me remember to hydrate, as well as eating watery fruit and vegetables such as cucumber, courgettes, celery, radishes, leafy greens, kiwis, watermelons and grapefruit. It’s my go-to remedy whenever I find myself accidentally calling one of our children Sammy, the name of our dog.

While changing my diet has brought all sorts of cognitive benefits (such as ability to remember names — pretty vital in my work as a writer and mental health campaigner), it is not my only “lifestyle intervention”. As anyone who has started a piece of work after going for a run knows, exercise helps us think straight: one 2016 study from the Netherlands showed that cardiovascular exercise improves memory. I’ve also started to learn, by heart, one poem a day to keep my brain on track. My 80-year-old mother has one of the sharpest minds I know, and her head is stocked full of rhyming couplets. Now, at 51, I don’t have many school runs left. But I’m glad that I’ve found strategies to make these last few years more endurable, enjoyable and — best of all — memorable.

–The Telegraph Group Limited, London 2017