1. Early Morning on an Empty Stomach
Green tea contains tannins that can increase stomach acid, leading to an upset stomach, nausea, or constipation.
According to some studies, consuming caffeine on an empty stomach can lead to a spike in blood sugar levels.
2. Immediately Before or After Meals
Drinking green tea before or after meals can dilute digestive juices, impairing the digestive process. This can lead to bloating, gas, and other digestive issues.
3. Late at Night
Green tea is a diuretic, meaning it can increase the frequency of urination. This can lead to sleep disturbances as you may need to get up frequently during the night.