Popeye was right about spinach: dark green, leafy vegetables are the healthiest food on the planet. As whole foods go, they offer the most nutrition per calorie.

Studies on cherries, raspberries and strawberries suggest that most of their nutrition is retained when they're frozen, so it's a good idea to keep some in the freezer.

Certain foods, such as meat, appear to harbour toxic bacteria - known as endotoxins - that can trigger inflammation in your arteries, even when food is fully cooked.

You have to build up to green smoothies. Everyone loves fruit smoothies: you can add a handful of baby spinach to a fruit smoothie and may hardly even taste it. Next, try two. Slowly, your taste buds can adapt to more greens.

We need to boost our intake of healthy plant foods and reduce our dependence on animal-based foods.

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.