[laoganmaplz]

Also the proportions. While (in the US at least) manufacturers are required to list their ingredients in the order of greatest proportion to least proportion, they are not required to disclose what those proportions are, which also adds some difficulty to reverse-engineering the recipe.

[sgerenser]

I think the biggest catch is being able to throw potentially thousands of different substances under the generic “natural flavorings.” Read the Coca Cola ingredients list and you certainly don’t see “coca leaf extract” on it.