They’re the products we regularly eat and drink without a second though - without really knowing what they are made of.
The recent news that the future of the creamy Oreo cookie recipe has been secured thanks to a remote high-tech vault means that the biscuits are now one of the products deemed too valuable to risk their unique formula falling into the wrong hands.
Here are seven food and drink secrets that will never be revealed.
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5. Dr Pepper
Notoriously divisive soft drink Dr Pepper was invented by a pharmacist in Texas in 1885. It's rumoured that they've taken an extra security of splitting the recipe in half, keeping them in two security boxes in two different banks. | Contributed
6. Lea & Perrins Worcestershire Sauce
Lea & Perrins Worcestershire Sauce came about after a nobleman called Lord Sandys hired a couple of chemists to create a sauce to replicate meals he had enjoyed in India. All the ingredients are listed on the bottle, but the precise mix is only known by a handful of bosses. | Contributed
7. Chartreuse
An alcoholic drink strong enough to blow your socks off - Green Chartreuse has a alcoholic content of 55 per cent, while Yellow Chartreuse is 'only' 43 per cent. The herbal liqueur was invented in 1605 and is still make to the same recipe by Carthusian Monks in the French town of Entre-deux-Guiers, high in the Alps. Only two of the monks are entrusted with the secret. | Canva/Getty Images