7 Side effect of excessive green tea 

Caffeine-related issues: Excessive consumption of green tea can lead to caffeine-related side effects such as restlessness, increased heart rate, jitteriness, anxiety, and difficulty sleeping.

Digestive problems: Excessive green tea intake may cause digestive issues such as stomach upset, nausea, diarrhea, or constipation.

Iron absorption interference: The tannins in green tea can inhibit the absorption of iron from plant-based sources, which may lead to iron deficiency anemia in individuals who rely heavily on these sources.

Dehydration: Green tea has diuretic properties, meaning it can increase urine production and potentially contribute to dehydration if consumed in excess without adequate fluid intake.

Interference with medication absorption: Some compounds in green tea can bind to certain medications, particularly those for blood thinning, and reduce their effectiveness.

Increased risk of osteoporosis: Excessive green tea consumption has been associated with an increased risk of osteoporosis due to its impact on calcium absorption and bone health.

Liver toxicity: While rare, excessive consumption of green tea extracts or supplements has been associated with liver toxicity in some individuals, potentially leading to liver damage.

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