A small minority of strokes are hemorrhagic strokes, which are caused by bleeding into the brain when a blood vessel bursts.

So, what is a stroke? In about 90 per cent of strokes, it's the result of blood flow to part of the brain getting cut off, depriving it of oxygen and killing off the part fed by the clogged artery.

Many people assume the diseases that kill us are pre-programmed into our genes. High blood pressure by 55, heart attacks at 60, maybe cancer at 70, and so on... But for most of the leading causes of death, our genes usually account for only 10-20 per cent of risk.

Simply switching to a healthy, plant-based diet can lessen stroke risk by reducing cholesterol and blood pressure, flooding your body with antioxidants and improving blood flow.

Strokes are categorized as either bleeding into the brain or a blockage in blood supply, known as an ischemic stroke. The latter are overwhelmingly more common, compromising about 87 percent of all stroke events.

Cholesterol - which you get from eating too much of the wrong kind of fat - doesn't just help clog arteries in the brain, it may also help to seed the amyloid plaques that riddle the brain tissue of Alzheimer's victims.