These different foods have different properties and compounds that can enhance brain health in different ways.
New research suggests that a structured programme that combines regular exercise with a brain-friendly diet may help improve memory and thinking skills in older adults who are at a higher risk of dementia.
The two-year study followed more than 1,000 adults aged between 60-77 across 11 Latin American countries who had risk factors such as high blood pressure, high cholesterol or smoking.
Half the participants completed supervised exercise four times a week, received personalised brain-healthy nutrition advice and took part in cognitive training, social activities and regular health monitoring.
The comparison group, meanwhile, received general health advice and attended four one-hour meetings over the two years.
Here are their top seven recommendations:
Make nuts your new go-to brain-boosting snack.
“Healthy fats give brain cells structure and function, so I would recommend adding nuts to your shopping list,” suggests British dietitian Lesley Reid.
She recommends Brazil nuts in particular, because as well as containing all the healthy fats, they are also rich in selenium, which is a powerful antioxidant that is great for the brain.
“Have no more than three Brazil nuts per day because they’re pretty powerful,” she advises.
“Have them raw as a snack, or chop them up and mix them through a yoghurt.”
Getting enough protein is also vital for brain health.
“We want to make sure we eat enough good protein sources because proteins are broken down into amino acids, and amino acids are the building blocks of all our cells,” explains Reid.
She adds that amino acids play a particularly important role in neurotransmitters, which make connections in the brain.
Many people think of protein shakes, meat and eggs when it comes to protein, but chickpeas are a great underrated source.
“Tins of chickpeas are a really good source of protein which are pretty cheap,” she says.
“You could roast them, add them to a salad, or blend them up and make them into a hummus to have with bread or as a dip with vegetables.”
“One colour of the rainbow that we are often missing from our diet is dark purple, and purple foods like blueberries are another great thing to add to your shopping list,” says Reid.
Blueberries are bursting full with brain-boosting properties, including flavonoids such as anthocyanins and quercetin.
“Research suggests that anthocyanins reduce brain inflammation, stimulate the growth of new brain cells and improve blood flow to the areas responsible for memory and focus,” says British nutritionist Priya Kannath.
“In addition, quercetin is a natural anti-inflammatory compound that helps protect brain cells from damage caused by everyday oxidative stress.”
Frozen blueberries are great because they last much longer than fresh ones.
“You can add them into smoothies, have them with porridge or blitz them with some yoghurt,” she recommends.
“Green leafy vegetables, such as kale and spinach, are rich in magnesium, high in B vitamins and are really good at supporting your energy production and nervous system function,” says Reid.
“They are also very high in vitamin C and offer that antioxidant protection, so are really good for brain function.”
Leafy greens are incredibly versatile and can be incorporated into your diet in many different ways.
“You could steam them, add them into curries, soups and casserole dishes.
“You could also add them into a quiche or into a green smoothie,” suggests Kannath.
“Research suggests that higher omega-3 intake has been linked to lower levels of beta amyloid proteins that are associated with Alzheimer’s disease,” says Kannath.
She notes that oily fish, such as sardines and salmon, are a great source of omega-3 fatty acids.
“I would recommend aiming for at least two portions of oily fish a week to get that omega-3 support,” she suggests.
“Canned fish is particularly great because it contains the softened bones of the fish, which will give an extra boost of vitamin D and calcium.
“However, if you prefer buying fresh or frozen fish, you could bake it, make a curry or grill it.”
“The more cocoa dark chocolate contains, the better it is,” says Kannath.
“Dark chocolate contains flavonoids – such as epicatechin, catechins and procyanidins – that can support cognitive function and also improve the blood flow to the brain.”
She recommends choosing a dark chocolate that is at least 70% cocoa.
“l would recommend eating a square of dark chocolate a day after your evening meal,” she says.
“Extra virgin olive oil contains anti-inflammatory properties that can help support vascular health which is central to brain health,” says Kannath.
“I would recommend drizzling a little bit of extra virgin olive oil over a salad.” – PA Media/dpa
