8 Potential Side Effects Of Matcha

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14 September 2025

Matcha, while packed with antioxidants and offering numerous health benefits, can have some side effects, especially when consumed excessively

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1) Digestive Issues: Matcha's tannins and catechins can irritate the stomach lining, leading to nausea, cramps, diarrhoea, and constipation, particularly on an empty stomach

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2) Caffeine Overload: With about 70mg of caffeine per cup, matcha can cause anxiety, jitters, rapid heartbeat, and sleep disruption if overconsumed

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3) Iron Absorption: Catechins in matcha can bind with non-heme iron, potentially leading to iron deficiency or anaemia, especially with high consumption

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4) Sleep Disturbances: Consuming matcha too close to bedtime can disrupt sleep patterns due to its caffeine content

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5) Liver Concerns: Excessive intake, particularly of concentrated extracts, might affect liver health

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6) Heavy Metal Contamination: Low-quality matcha may contain contaminants like lead or arsenic

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7) Increased Blood Pressure: Matcha might raise blood pressure in some individuals

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8) Allergic Reactions: Rare cases of allergic reactions, like rashes or breathing difficulties, can occur

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