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Why Do I Get Side Effects And Nausea Drinking Green Tea?

Written by:

Obi Obadike

Obi Obadike

Celebrity Fitness & Nutrition Expert, CFT, SFN, M.S. Founder & CEO – Ethical Inc.
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Why do I get side effects and nausea drinking green tea? If you are drinking green tea in moderate dosages, it is relatively safe and healthy. Research studies have shown that some of the health benefits of green tea are lower risk of cardiovascular disease by decreasing LDL cholesterol levels, anticancer properties, weight loss, improvement in neurological diseases like Alzheimer’s and Parkinson’s disease, etc.

Why do I get side effects and nausea drinking green tea? Photo Credit: iStock-DevMarya

Green tea also contains an amino acid called L-theanine which helps to regulate blood sugar levels. Green tea is seen as an alternative to coffee because it has less caffeine.

Some of the side effects of drinking green tea are nausea and this is caused by polyphenols which are also known as tannins. This ingredient in green tea causes nausea to some people. And some of the other side effects are:

  • Stomach problems– This can happen if you drink green tea on an empty stomach. Green tea contains tannins which can increase the amount of acid in the stomach. This excess acid is what leads to nausea, acid reflux and constipation. To avoid this drink green tea after you eat a meal.
  • Inability To Sleep– Green tea has small amounts of caffeine but it can cause insomnia for people who are sensitive to consuming any amount of caffeine in the evening time.
  • Dizziness– If you are drinking too much green tea it can cause dizziness and lightheadedness at times. This is caused by caffeine decreasing the blood flow to the brain and central nervous system.
  • Irregular Heartbeat and Blood Pressure– There have been some small studies that have shown that drinking green tea can cause irregular heartbeat. There have also been studies that have shown that green tea can lower blood pressure. But there are also studies that have shown it can raise blood pressure too.
  • Risks For Pregnant women– Research studies show that pregnant women shouldn’t consume more than 2 cups of tea per day. Drinking more than 2 cups per day can potentially lead to miscarriage and birth defects in babies. The caffeine intake for pregnant women should be no more than 200 mg daily.
  • Bone Health– Excessive consumption of green tea can increase the risk of osteoporosis and erode your bone density. If you are predisposed to bone disease, then it is best to limit your intake to 2 to 3 cups of green tea per day.

“Research studies show that pregnant women shouldn’t consume more than 2 cups of tea per day. Drinking more than 2 cups per day can potentially lead to miscarriage and birth defects in babies.” Celebrity Fitness & Nutrition Expert Obi Obadike

The Bottom Line is green tea is safe if you drink it within moderation. The negative effect of green tea is because of the caffeine content from it.

So, if you overconsume green tea then the side effects you experience are from the excessive consumption of caffeine. If you overconsume caffeine, you will always experience negative side effects.

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References

1. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1964900/

2. https://nccih.nih.gov/health/greentea

3. https://www.ncbi.nlm.nih.gov/pubmed/22214254

4. https://www.cambridge.org/core/journals/acta-neuropsychiatrica/article/effect-of-l-theanine-on-glutamatergic-function-in-patients-with-schizophrenia/4C52908DEEDE7C938EA5110D13AA2BA2

5. https://www.ncbi.nlm.nih.gov/pubmed/16930802

6. https://academic.oup.com/cdn/article/1/2/1/4558629

7. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5093162/

8. https://www.ncbi.nlm.nih.gov/pubmed/10404946

9. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2744612/

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