Mass hysteria is a powerful force. It reduces the IQ of groups of people to that of a bowl of pablum
. Supposedly people in China are scooping up iodized salt and creating a shortage there because they think it will protect against radiation,,,,which doctors say it won't. People in the US supposedly scooped up just about all the available stock of potassium iodide pills here because the deadly radiation was going to cross the pacific intact and land in Iowa. (PS...... not something that you want to take without medical advice.)
If one reads that report on food.... after you get past the alarmist and sensationalist headline designed to improve ratings and profits.......... you'll notice the same report mentions that if you ate 1 kilo (2.2 pounds) of spinach a day, every day, for a year, ..... you'd get exposed to about the same radiation as a single tomography scan.
Yum.... eat up.
I'd guess the exposure to tea might be similar if it were similarly contaminated.... which it likely WON'T be because the tea growing regions are far away from the nuclear plant. So maybe you'd have to brew 2.2 pounds of tea a day and drink it all and then eat the leaves.