Don't drink matcha too quickly or drink too much of it. Take my advice, it can make you feel nausea. However, it's normal and will only last about an hour or so. It is a temporary adjustment, that goes away. Matcha has high levels of tannins and tannins can disrupt your stomach, especially on an empty stomach. The good news is that you can eliminate this side effect of nausea by drinking your matcha with food. Or, you can use it in a smoothie, which is very popular today. It also can be used in cakes, lattes, and desserts.