Answer by Lisa Lin:
The best timing is to drink it about 1 hour after a meal, because green tea can hurt iron absorption while your food is being digested in the first our after your meal.
Besides timing after meals, you can drink green tea any time, except:
– in the evening if you are sensitive to caffeine (though it’s significantly less than coffee).
– on a really empty stomach
From a seasonal perspective green tea is the best to drink in hot summers, because it has a ‘cooling’ property.