Professional cyclists leave no stone unturned when it comes to sports nutrition – so with Mark Cavendish marking American pistachios out as his official snack it is worth taking notice.

British Cycling and Team Sky nutritionist Nigel Mitchell says the benefits of American pistachios are two-fold – nutritious, and also a convenient snack (snacking being something Mitchell advocated when we spoke to him about beating the bulge).

So if you want to follow the 25-time Tour de France stage winner and former world champion, we have good news for you.

We have teamed up with Ketchum, who help to promote American Pistachio Growers, to offer one lucky reader a month’s supply of the high-protein, low fat snack.

And all you have to do to win is answer the simple question below by midnight on Monday September 21.