A US website claims to have unveiled one of the biggest mysteries in grocery – the secret formula used to make Coca-Cola.

Thisamericanlife.org has published a recipe for what it claims is Merchandise 7X, the key to Coke’s 125-year-old recipe.

A photo taken in 1979 for the Atlanta Journal-Constitution supposedly showed a hand-written copy of the recipe in a book. You can read the recipe here.

Coca-Cola is the world's largest soft drinks brand. Earlier this month the company announced positive sales growth across all of its global markets for the first time since 2003.

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