The other day I was having lunch with the amazing Gina Lazenby, bestselling author, speaker and mentor for women leaders and entrepreneurs. Gina is one of the best multitaskers I know. A consummate networker, she loves to hold women’s circles and put people together, focusing on the rise of the feminine (the title of her forthcoming book).

Gina is also passionate about healthy living. In 2000 she and her partner created the Healthy Home (stayatthehealthyhome.wordpress.com), a successful experiment in renovating a traditional stone cottage in the Yorkshire Dales. Their plan was to create a cozy, modern interior for retreats with the minimum of chemicals and disturbance from electromagnetic fields (EMFs) and renovated with natural materials.

Amid this flurry of activity, most recently Gina has become a part-time carer. She cooks for her parents, both well into their nineties, one with creeping dementia, and also  for a close friend, who was diagnosed with Parkinson’s disease just before the Covid-19 pandemic.

The common issue in her three charges is a brain essentially on fire, and Gina has learned a great deal about what kinds of treatments can heal this type of chronic inflammation. Under her direction, her mother and friend use red-light therapy, ozone chambers, exercise and activities to engage the brain.

But what possibly makes the greatest difference is the foods she prepares for them. Gina is a wonderful holistic cook who grows some of her own organic food. She has long known that eliminating sugar and adding certain healing substances can reduce brain shrinkage and reawaken parts of the brain that aren’t working well. Lately she’s found evidence that nettles, which grow wild all around her home in Yorkshire, used in soups or as a tea, can reduce free radicals and boost learning, brain function and mood.

Early on, Gina realized that modern medicine had no real solutions to an ailing brain. In fact, the latest Alzheimer’s drug, lecanemab, an anti-amyloid immunotherapy treatment hailed in the news as a wonder drug for the disease, is based on a faulty premise and causes a horrific list of side effects, including potentially fatal brain bleeds. And with Parkinson’s, doctors dispense dopamine-replacement drugs that can eventually stop working and simply tell their patients to expect a slow and steady decline.

What is missing from the current medical model is the extraordinary role of diet. There’s no doubt that ultra-processed food is hugely toxic to the brain; those with type 2 diabetes (a consequence of a high-sugar diet) double their risk of developing Alzheimer’s disease. And Parkinson’s, which disturbs the brain’s ability to control the nervous system and movement, also appears to start in the gut.

In the 1990s, leading nutrition expert Patrick Holford set up the Brain Bio Centre within the Institute for Optimum Nutrition to treat people suffering from an array of mental health issues. In the process, he discovered the work of people like Helga Refsum, professor of nutrition at the University of Oslo, whose studies showed that nutritional treatment could reduce shrinkage by a whopping 73 percent in the areas of the brain typically affected by Alzheimer’s.

As Holford writes in his new book Upgrade Your Brain (Thorsons, 2024), a healthy diet lowers your risk of developing Alzheimer’s by up to a whopping 92 percent. This kind of diet, as he defines it, it is essentially a Mediterranean diet: chock full of fish, fruits and vegetables, legumes, whole grains, nuts and seeds, and even some red wine.

Vitamin and mineral supplements are also key to keeping your brain sharp, but one of the most important of all for brain health, again overlooked by the medical profession, is a B-complex vitamin pill.

Much of brain inflammation starts with a deficiency of B vitamins, particularly B12. Holford writes about the link between dementia and excess levels of homocysteine, the amino acid that attacks arteries and ultimately affects the heart.

Some 80 percent of dementia cases could be avoided, he estimates, by taking one B-complex vitamin, together with omega-3 fatty acids from either seafood or supplements. Both act synergistically to mop up excess levels of homocysteine, healing both the heart and the brain.

This is particularly important since an estimated 50 percent of people over 65 have raised blood homocysteine.

The same goes for Parkinson’s disease. According to research from Japan, Parkinson’s is caused by a gut losing its ability to process vitamins B2 (riboflavin) and B7 (biotin).

Gina, who makes healthy soups with many of these ingredients for her parents and her friend, has seen a major difference. Her mother is holding steady, and her friend (in his early 60s) has shown huge improvements. When first diagnosed, he lost feeling and mobility in his left side; today he can do a warrior 3 yoga move, leaning forward, balancing on one foot, with the other leg and both arms extended.

The point is that cognitive decline with age isn’t inevitable. You can keep your brain sharp in your nineties so long as you maintain a healthy respect for what exactly you feed your head.