One dietary practice may be linked to healthier long-term brain ageing (stock image) (Image: Ekaterina Goncharova via Getty Images)

Sticking to a single dietary practice for over two decades could help 'slow down' brain ageing, new research suggests. This long-term eating pattern, scientists believe, could reduce several typical 'metabolic alterations', some of which are associated with Alzheimer's disease.

The study , spearheaded by Boston University in the US, involved 10 male monkeys divided into two main groups. The first group was fed a 'normal', balanced diet, while the other consumed about 30% fewer calories for the rest of their lives.

After all the monkeys had naturally died, the researchers analysed their brain matter using single-nuclei RNA sequencing. The results indicat

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