It's a scandal of international proportions. A professor of chemistry at Bryn Mawr College in Pennsylvania claims to have found the recipe for a perfect cup of tea.
It involves a pinch of salt and energetically squeezing the tea bag.
The claim sparked outrage in the UK, prompting the US embassy in London to respond.
In an official statement shared on social media, the embassy confirmed that adding salt to tea is not official US policy, but suggested making tea in the microwave is.
Zealong Tea Estate research and development manager Amy Reason spoke to Corin Dann.