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“You know, we love green tea and black tea so much. I feel very peaceful drinking white tea, although I feel awake too.”

When the BBC met them at their homes, they offered us black tea - Sulemani chai - in chipped cups as they spoke in voices worn down by sorrow.

Another challenge for black tea is that even for those for whom it is a staple, costs are rising and so they are buying in smaller volumes.

This is the same plant used to make green and black tea.

"Certain types of black tea are also high in fluoride and should be avoided by pregnant women."