What Happens to Your Body When You Drink Too Much Green Tea

Green tea is often celebrated for its health benefits, but consuming it in excess can lead to some unwanted effects. If you're drinking more than 3-4 cups a day, or if you have specific health conditions or consume other sources of caffeine, here's what you might need to consider.

You May Feel Jittery or Nervous

Caffeine Content: Green tea's caffeine can increase alertness, but too much can cause jitters or anxiety. It's advisable to avoid drinking it at least six hours before bedtime to reduce the risk of insomnia.

Caffeine Sensitivity: Some people are more sensitive to caffeine and may feel overstimulated with even small amounts.

Medication Interactions: Caffeine can amplify the effects of stimulants or decrease the efficacy of anti-anxiety medications and sleep aids. However, green tea contains L-theanine, which may help mitigate some of caffeine's effects by promoting calmness.

Your Heart Rate and Blood Pressure May Rise

While green tea supports heart health, its caffeine can temporarily increase heart rate and blood pressure, particularly in those sensitive to caffeine or drinking more than 4-5 cups daily.

Drinking green tea with certain medications or supplements, such as stimulants, blood pressure medications, or supplements like ginseng, may exacerbate cardiovascular risks.

Your Digestion and Medication Absorption May Change

Appetite Changes: Green tea might slightly suppress appetite due to its caffeine, catechins, or the increased fluid volume, though research is mixed on this effect.

Gut Symptoms: Tannins and catechins in green tea can cause nausea, especially when consumed on an empty stomach. Some people may experience reflux or diarrhea.

Liver Safety: Excessive intake of green tea (several liters daily) may contribute to liver injury.

Medication and Nutrient Absorption: Green tea can interfere with the absorption of various medications, including beta-blockers and statins, and may reduce iron absorption. Therefore, it's best to drink green tea 1-2 hours before or after meals. In rare cases, excessive green tea consumption has led to low potassium levels.

Safe Caffeine Intake Guidelines

• Adults: 400 milligrams (mg)

• Pregnancy or Breastfeeding: 200 mg

• Children 12–18: Under 100 mg/day; it's recommended to avoid energy drinks.

• Children Under 12: Avoid caffeine altogether

Green tea contains approximately 20–45 mg of caffeine per 6 to 8-ounce serving.

Moderation is Key

Green tea can be a beneficial part of a healthy diet, but moderation is essential. For those on medications or with health conditions, it is important to consult with a healthcare provider before incorporating green tea regularly into your routine to avoid potential complications.