A nutrient-dense superfood available for just 45p at Tesco offers potential protection against dementia while supporting heart health and strong bones. Sardines deliver a rich supply of omega-3 fatty acids and vitamin D, along with essential minerals like calcium, iron, potassium, zinc, copper, manganese, selenium, and B vitamins including thiamin, niacin, B6, folate, B12, plus vitamins A, E, and K.
Daily Omega-3 Recommendations
The National Institutes of Health advises 1.1 to 1.6 grams of omega-3 fatty acids daily. Each 120g tin of sardines provides approximately 3 grams, making it an efficient source.
Key Research on Omega-3 and Brain Health
Scientists at University College London analyzed fruit fly brains and human brain cells to assess omega-3’s effects on neurological function. The flies featured a genetic mutation associated with motor neurone disease and frontotemporal dementia.
Study leader Professor Adrian Isaacs from the UK Dementia Research Institute stated: “From our findings we can conclude that enhancing levels of omega-3 fatty acids in the brain may be beneficial in motor neurone disease. Of course, the next step is to test this in people. We first need to work out which specific fatty acid would be best to test in humans, and how we can deliver sufficient quantities to the brain. Then, we want to take these findings forward into a clinical trial.”
A separate U.S. study found that higher omega-3 intake during midlife lowers dementia risk. Participants with elevated omega-3 levels scored better on cognitive tests and showed larger hippocampi, vital for memory.
Expert Insights on Diet and Dementia Prevention
Dr. Sara Imarisio, Head of Research at Alzheimer’s Research UK, noted: “As the saying goes, ‘You are what you eat’, and just like other parts of the body, our brains can be affected by the way we live our lives, including our diet. In this study, scientists looked at omega-3 fatty acid levels in the blood of people who did not have dementia, finding higher levels were more common in those with better brain structures. Of course, this doesn’t prove that high omega-3 is the reason for the differences in the scans.”
She added: “Research into omega-3 and brain health has produced mixed results, and whilst this study adds to the evidence base, it is exploratory and not conclusive. And because it only looked at people in middle age, this study only offers a snapshot of the full story – it did not look to see whether people went on to develop conditions like dementia. What we do know is that a healthy brain in midlife is important for brain health in later life too, and that a healthy diet overall is important in reducing dementia risk. Our research has shown that only a third (33%) of people think it’s possible to reduce their risk of dementia. However, up to 40% of dementia cases could be avoidable through health and lifestyle choices we can influence. As well as having a balanced diet, the best current evidence to keeping your brain healthy as you age, include not smoking, staying mentally and physically active, only drinking in moderation and keeping blood pressure and cholesterol in check.”
Where to Find Them and Alternatives
Tesco offers its own-brand sardines in tomato sauce (120g tins) for 45p each. Other omega-3-rich options include salmon, mackerel, anchovies, walnuts, and flaxseeds.
