Who should limit drinking green tea?

SKĐS - Green tea is a familiar drink with many health benefits. However, excessive or improper use can lead to some side effects. So who should limit drinking green tea?

1. Potential disadvantages of green tea

Content

• 1. Potential disadvantages of green tea
• 1.1. Causes gastrointestinal discomfort
• 1.2. Increases blood pressure and heart rate
• 1.3. Green tea can affect sleep
• 1.4. Reduced iron absorption, increased risk of anemia
• 1.5. Risk of liver damage
• 1.6. Drug interactions
• 2. Who should limit drinking green tea?
• 3. How much green tea is enough?

1.1. Causes gastrointestinal discomfort

Most people can drink green tea without any problems, but using green tea extract or drinking it too strong can lead to:

• Stomachache
• Nausea
• Constipation...

People with sensitive stomachs should drink tea after meals and avoid drinking on an empty stomach to limit irritation to the mucous membranes.

Green tea leaves.

1.2. Increases blood pressure and heart rate

Green tea contains caffeine - a stimulant that can cause temporary increases in blood pressure, rapid heartbeat, headaches, restlessness and insomnia if consumed in excess. Experts recommend not exceeding 400 mg of caffeine per day, equivalent to about 8-10 cups of strong green tea.

1.3. Green tea can affect sleep

The caffeine in green tea can cause insomnia and anxiety, especially when consumed in the evening. People with poor sleep should avoid drinking green tea after 4 p.m. to ensure quality sleep.

1.4. Reduced iron absorption, increased risk of anemia

The catechins in green tea are powerful antioxidants, but they can also inhibit the absorption of iron from food. This makes people with low iron levels more susceptible to iron deficiency anemia. For people with iron deficiency:

• Drink green tea at least 1–2 hours away from meals.
• Talk to your doctor about iron supplements that are right for you.

1.5. Risk of liver damage

Although rare, some people with a particular genetic variation may experience liver damage when taking high doses of green tea extract. Warning signs include fatigue, jaundice, dark urine, or pain in the right upper quadrant. If you have a history of liver disease, consult your doctor before using green tea or tea extract products.

1.6. Drug interactions

Green tea can change the concentration of drugs in the blood, making the drug less or more effective. Special attention should be paid when using:

• Beta-blockers (cardiovascular treatment)
• Blood thinners (increased risk of bleeding)
• Cholesterol medication
• Antidepressants
• Osteoporosis medication

If you are taking any long-term medication, consult your doctor before supplementing or drinking green tea regularly.

2. Who should limit drinking green tea?

Most healthy adults can drink green tea every day, but some groups should limit their intake.

Green tea is generally safe, but it's not right for everyone. Be cautious if you:

• Iron deficiency anemia
• Have liver disease
• Pregnant or breastfeeding (due to caffeine content)
• Sensitivity to caffeine (common in people with anxiety, sleep disorders, cardiovascular disease)...

Green tea extract products are not currently regulated by the US Food and Drug Administration (FDA) for safety and effectiveness, so use with caution.

3. How much green tea is enough?

Most healthy adults can drink green tea every day without experiencing side effects. It does contain caffeine, and most health professionals recommend limiting caffeine intake to 400 milligrams per day. One cup of green tea contains about 22–40 milligrams of caffeine.

However, if you are taking medications for heart disease, high blood pressure, high cholesterol, liver disease, anxiety, depression, or osteoporosis — limit your green tea intake and consult your doctor to avoid adverse interactions.

Green tea is a healthy beverage when consumed in moderation. Drinking too much, especially in extract form, can be harmful to the liver, heart, and digestive system and reduce iron absorption. Stick to a reasonable dosage and talk to your doctor if you have an underlying health condition or are taking medication.

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Source: https://suckhoedoisong.vn/nhung-ai-nen-han-che-uong-tra-xanh-169251113224316234.htm