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Need To Know > Fitness and health > Harvard-trained doctor reveals popular Christmas snack that SLASHES dementia risk
Harvard trained doctor reveals the festive snack that can cut dementia risk by 17 percent explaining how a daily handful of unsalted nuts boosts brain gut and liver health.
Fitness and health

Harvard-trained doctor reveals popular Christmas snack that SLASHES dementia risk

Amy Walters
Last updated: December 16, 2025 10:42 am
Amy Walters Published December 16, 2025
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Dr Saurabh Sethi explaining the health benefits of eating nuts. (Jam Press/@doctor.sethi)
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A doctor who graduated from Harvard University has revealed which popular Christmas snack slashes the risk of dementia.

Dr Saurabh Sethi, a gastroenterologist, often shares his advice and expertise with his 1.4m followers on Instagram, @doctor.sethi.

The 42-year-old previously shared which protein source is the “worst” for the body – protein bars – as the quick fix snack is packed with sugar.

READ MORE: ‘Doctors removed my vulva and bum after horror cancer ravaged my body – it started with itching that left me feeling on fire’

Now, the doctor, from California, US, has divulged which popular Christmas snack can help to slash the risk of dementia, reports Need To Know.

In a clip, which has racked up 77,000 views and over a thousand likes, he explains how and why.

Harvard trained doctor reveals the festive snack that can cut dementia risk by 17 percent explaining how a daily handful of unsalted nuts boosts brain gut and liver health.
Dr Saurabh Sethi. (Jam Press/@doctor.sethi)

“Science says that if you eat 30 grams of nuts everyday that are unsalted, you could reduce your risk of all-cause dementia,” he said.

He notes it can cut down the risk by 17%.

He explained: “[This] is compared to no daily nuts.

“Nuts are nutrient rich with multiple bioactive compounds including antioxidants, unsaturated fatty acids and fibre.

“These offer benefits for the brain and gut health.”

Dr Sethi says just a handful per day can do the trick.

But it depends on which type of nut.

For whole nuts, it’s around 20 almonds, 15 cashews, 14 walnut halves, 20 hazelnuts or 30 pistachios; which amount to around 200 calories.

Dr Sethi said: “What I personally like to do is eat a handful of mixed nuts during lunchtime.”

(Jam Press/@doctor.sethi)
(Jam Press/@doctor.sethi)

In another clip, racking up 1m views and over 6,000 likes, he explains the other benefits of eating nuts daily.

He added: “It’s a food I never skip as a doctor.

“Nuts decrease my risk of colon cancer.

“Improves my liver health because of Vitamin E and it improves gallbladder health, as well as decreasing risk of gallstones.

“And helps with acid reflux due to fibre and calcium.”

READ MORE: ‘I’m a super fit nan with rock-hard abs at 65 – I put BUTTER in my coffee and eat SIX times a day’

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