Apples contain two distinctly different types of fibre that work together to balance cholesterol in the body. The insoluble fibre grabs onto LDL, "bad cholesterol," while the soluble fibre reduces the amount of LDL produced by the liver. The bowel regularity promoted by apple fibre also helps to sweep excess cholesterol and other waste metabolites out of the body.

We now know LDL doesn't threaten cardiac health independently; it's oxidized LDL that can wreak havoc. So, if we can stop free radical damage from happening to our cholesterol and cholesterol transport systems, we will do our arteries a world of good.

Fascinatingly, a research study at Cornell University found that the antioxidant activity of 100 grams of apples was equal to 1500mg of Vitamin C. Apples have an antioxidant complex that includes vitamin C, as well as quercetin, chlorogenic acid, polyphenols and other powerful phytochemicals.

It appears that the free radical quenching activity protecting LDL from oxidation peaks around three hours after eating an apple, and declines in, you guessed it, 24 hours.

So, one a day it is.

Generally, it's best to keep them in the fridge for storage, but if they are unripe and you are antsy to eat them, you can place them in a paper bag in a cool, dark, airy place, which will trap enough emitted ethylene gas to speed up their ripening. This is the same reason one rotten apple can ruin a whole fruit bowl.

Where possible, purchase organic to avoid wax and pesticides.