Collaborations,  Press Release

New UK BioBank Study Finds That Up to 73% of Dementia Cases Can Be Avoided

New UK BioBank Study Finds That Up to 73% of Dementia Cases Can Be Avoided. Hello everyone, I hope you are well. In today’s post, I will be sharing a press release from the Food for the Brain Foundation. According to a recent study, up to 73% of dementia cases can be prevented by addressing risk factors that are largely under our control, including diet, lifestyle, and health status. This is in contrast to the conventional view that genes play a major role in developing dementia, when in fact they account for less than 1% of cases of Alzheimer’s. The study, which followed 344,000 people over 15 years from the UK BioBank, suggests that factors such as diet, exercise, and overall health could potentially prevent or delay up to 40% of dementia cases.

New UK BioBank Study Finds That Up to 73% of Dementia Cases Can Be Avoided

The authors of the study, published in the Nature Human Behaviour journal[1], investigated 210 modifiable risk factors. They found that increasing hand grip strength, a good reflection of physical strength, increasing leisure or social activities or time spent in sports clubs or gyms, spending less time watching TV or on a computer, having better dental health, drinking more water, not dozing off in the day and sleeping between 7 to 9 hours a night, not smoking or being exposed to smoke and having better lung function were all associated with less risk.

Being unemployed, having a low income, having diabetes, high blood pressure or having had a stroke or brain injury all increased risk. Inheriting the so-called ‘Alzheimer’s gene’ ApoE4 didn’t significantly affect overall risk.

However, even this figure of 73% may be underestimated as this study excluded blood test measures. “We have probably under-estimated the power of prevention,” says Professor David Smith from the University of Oxford, one of the study authors. “Even this figure of up to 73% of cases preventable could be higher if a person’s omega-3 and B vitamin status, measured by a blood test for homocysteine that any GP can do, were taken into account.”

BioBank Study

While the BioBank study didn’t include blood test measures of either homocysteine or omega-3, scientists at the US National Institutes of Health have attributed 22% of the risk of Alzheimer’s to raised blood homocysteine and 22% to a lack of omega-3[2].

“These have been shown to predict risk but were beyond the scope of this study.” confirmed the study author, Professor Jin-Tai Yu from Shanghai’s Fudan University. “Homocysteine-lowering treatment with B vitamins, especially B12, is one of the most promising interventions for dementia prevention.”

Professor Smith’s group at Oxford University tested the effects of giving B vitamins (B6, B12, folate) versus placebo to those with pre-dementia and found that the 10p a day supplements halved the rate of brain shrinkage in one year and virtually stopped further memory loss.[3]

The Greatest Effect

“The greatest effect we found in our trial was in those in the top third of DHA for the blood level of DHA (an omega-3) found in fish. Those with high DHA given B vitamins reduced their rate of brain shrinkage by 73%, down to the level normally seen in older people with loss of cognitive function. They also had virtually no further memory loss, and almost a third ended the trial with no clinical dementia rating.”

The benefit of omega-3 was also confirmed in a major study this year of over 100,000 people, finding that increased omega-3 cut the risk of dementia or cognitive decline by around 20%. An increase in intake of omega-3 DHA of 200mg, found in either a serving of fish or a fish oil supplement, decreased risk by almost a fifth.[4]

One charity taking prevention seriously is the charity Food for the Brain. They offer, at, a free online Cognitive Function Test, which includes a Dementia Risk Index questionnaire assessing your diet, omega-3 and B vitamin status, and lifestyle and an optional home-test kit for pinprick blood tests.

Cognitive Foundation Test

“Over 400,000 people have taken our validated Cognitive Function Test, which shows a person their cognitive status right now and their future risk based on our Dementia Risk Index questionnaire, what’s driving future risk and what they can easily do right now to lower it. If all modifiable risk factors are considered, including B vitamins and omega-3, a person could likely reduce risk by over 80%.” says their CEO, Patrick Holford.

“The government has pledged £160 million a year for dementia prevention research, but we are not seeing any of this going into easy prevention wins. Most seem to be fuelling drug research for an apparent ‘cure’. Alzheimer’s is preventable but not curable. You cannot reverse holes in the Brain. With over 200,000 people diagnosed every year with dementia, if prevention were taken seriously, we could halve the number of people developing this terrible but preventable disease.”

I hope you enjoyed that.

Talk soon.


The Food for the Brain Foundation ( is an educational and research charity on dementia prevention. It’s a free online validated Cognitive Function Test, followed by the Dementia Risk Index questionnaire assessing eight drivers of dementia. Including ‘brain fats’ and ‘low carbs & GL’, thus identifying those eating too many carbs and not enough brain fats, then advising them what to do.


Working with Strong women, I help empower women not to give up on their goals and find true happiness within themselves. #lifestyle #womenempowerment #selfcare


  • Melanie williams

    Dementia is a cruel disease so studies like this give hope and motivation as it focuses people too look at changes they can make to their everyday life’s. Brilliant post thank you so much for this lovely xx

  • Stephanie

    Dementia is something I really fear. I would hate for my mind to give out while my body is still functional like that. It’s great they are finding ways to help prevent it!

  • Ntensibe Edgar

    Aahhh yes, dementia is really bad. The good thing is that we can prevent it from happening, with more reading, brainwork, consuming more fish as well as avoiding situations that can get us in contact with blunt-force trauma. Very good piece, Sonia!

  • Barbie Ritzman

    It’s interesting to learn about ways to avoid dementia. But it makes sense to stay active to keep both the body and mind active. A lazy body can lead to a lazy mind.

  • Debbie

    This is a very informational post for my family. With dementia in our family tree – I’m always searching for studies and data to learn more on preventative care.

  • Olga

    Dementia is a hot topic for me because a couple of females in my family had dementia during old age. I’m doing my research, and I work on planning how to help my brain. I like omega 3 and try to take it regularly.


    This is such an interesting post. It’s good to be aware of things that can be used as preventatives for a condition like this as it affects so many people. I’ll be sure to make sure my parents are taking plenty of vitamin B. I know they are taking omega 3 supplements so that part is covered. Prevention is better than cure so we need to see more funding going into this rather than a “miracle drug” that will have numerous side effects and won’t be effective for all or 100% anyway.

  • Nyxie

    Now this is an interesting one! I had no idea that Dementia could be preventable! I’ll definitely be reading more into this to find out how I can protect both my husband and I!

  • Claudia

    If this study isn’t proof that what we put on and in our bodies and how we treat them doesn’t affect our long-term health, then I don’t know what is. Thanks so much for sharing this!

  • Beth

    I’m really not surprised at all by these findings. So many of us constantly put unhealthy things into our bodies, and those are eventually going to manifest in some way.

  • Knycx Journeying

    Thanks for sharing the data and some practical info about how to due with these issue, it is an important problem andw we all (eventually) will need to face it. We need to work on avoiding them, will share this with my friends and families too.

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