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Jun 26, 2026

Simple daily sunshine habit could cut dementia risk by up to 40%

Simple daily sunshine habit could cut dementia risk by up to 40%, major study finds

Spending more time in daylight could significantly reduce the risk of developing dementia later in life, according to a major new study.

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A major study has found that increased exposure to daylight is linked to a lower risk of dementia (Image: Getty)

Spending more time in daylight could play a role in lowering the risk of developing dementia later in life, according to new research.

Scientists analysing data from nearly 87,600 adults found a consistent link between higher levels of daytime light exposure and a reduced likelihood of developing the condition.

The study, carried out by researchers at universities in China and published in the journal General Psychiatry, followed participants for around eight years. The average age was 62, and all wore wrist-worn devices measuring both movement and light exposure.

Over the course of the study, 741 participants were diagnosed with dementia.

Researchers found that people spending more time in brighter environments during the day had a significantly lower risk of developing the condition compared with those in dimly lit indoor settings.

Those exposed to average daytime light levels above 1,000 lux — roughly equivalent to a brightly lit indoor space or an overcast day outdoors — had a 16 per cent lower risk of dementia.

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Spending around 1.5 hours a day in light above 3,000 lux, similar to outdoor daylight, was associated with an 18 per cent reduction in risk, while 40 to 45 minutes in very bright light above 7,000 lux was linked to a 17 per cent decrease, reports the Daily Mail.

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