Jul 2, 2017, 21:10
The moisture content of matcha is about 2-3%. Most likely where you live is higher than 2-3% humidity. If you keep it in the fridge and then open it up immediately it will suck up moisture, yes, absolutely. You're better off to just keep it in a cool place and not the fridge once the seal is broken. That applies to just about any green tea really. Until the seal is broken, yes, keep it in the fridge. Once it's opened, don't.