Good question! I don’t tend to do it religiously, but if I’m going to buy large amounts of tea rather than just for pleasure, I’ll eat an apple or drink some hot water beforehand normally. There’s also a few things (for me it’s bread) which can really affect the taste of the tea – not just negatively, but sometimes a tea can have a really nice refreshing aftertaste depending on what you’ve been eating before. Maybe there’s someone out there who knows more about the science side of things?