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Consuming olive oil may cut stroke risk

Scientists have found that consuming olive oil could almost half the risk of stroke in older people.

Researchers at the University of Bordeaux looked at the medical records of almost 8000 people aged 65 and over living in three French cities.

All participants had no history of stroke, and were monitored for five years.

They found those who regularly used olive oil for both cooking and as a dressing lower their risk of stroke by 41 per cent, compared to those who never used the product.

But Australian dietitian Prof Catherine Itsiopoulos admitted that the findings were limited.

“It is difficult to attribute the outcomes just to olive oil because it is very difficult to measure accurately what the olive oil intake of a person is,” the Herald sun quoted Catherine Itsiopoulos, head of dietetics at La Trobe University, as saying.

Why our hair turns grey

Researchers at NYU Langone Medical Centre have shown that Wnt signaling, already known to control many biological processes, between hair follicles and melanocyte stem cells can dictate hair pigmentation. 

“We have known for decades that hair follicle stem cells and pigment-producing melanocycte cells collaborate to produce coloured hair, but the underlying reasons were unknown,” said Mayumi Ito, assistant professor who led the study.

“We discovered Wnt signaling is essential for coordinated actions of these two stem cell lineages and critical for hair pigmentation,” added Ito.

The lack of Wnt activation in melanocyte stem cells leads to depigmented or grey hair.

Regular exercise could help keep Alzheimer's at bay

Exercise raises levels of a brain molecule that may help protect against Alzheimer’s disease, a new research has shown.

Scientists believe the protein PGC-1alpha, which also appears to guard against type 2 diabetes, could lead to new treatments for treating Alzheimer’s. Researchers studied brain samples from dead Alzheimer’s patients and from healthy people. They found less PGC-1alpha in the Alzheimer’s-affected brains, reports the Daily Express.

Since exercise boosts levels of PGC-1alpha, the findings may help explain the link between regular physical activity and reduced Alzheimer’s risk.

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