Different kinds of green tea is now filling the shelves in marts. Everyone on the street will tell you something about the utility of this type or that type.
Is it so insane or magic thing for us?
Kindly share you views about this.
Some Side Effects of Green Tea:
1. Diabetes: Consumption might affect blood sugar control.
2. Diarrhea.
3. Anxiety disorders where you experience jitteriness, headaches and upset stomach.
4. Irritable bowel syndrome (IBS): It can worsen diarrhea and might worsen symptoms of IBS.
5. Bleeding disorders: It can increase the risk of bleeding.
6. Heart conditions: Might cause irregular heartbeat.
7. Glaucoma: Could increase pressure inside the eye.
8. High blood pressure: Might increase blood pressure in people with high blood pressure.
9. Osteoporosis: It can increase the amount of calcium, essential for bone health, which gets flushed out in the urine.
10. Nutritional deficiencies: The binding action of polyphenols may make it harder for the body to absorb certain medicines and iron supplements.
11. Pregnant or breast-feeding women should not drink green tea in large amounts. Caffeine can cross the placenta and affect the fetus and can also be passed along in breast milk.
12. Skin allergies.
The most important side effects of green tea includes hepatotoxicity and gastrointestinal disorders especially when consumed on an empty stomach.
Please also have a look at these useful RG links.
Article Review on green tea constituents and its negative effects
Technical Report Green Tea and its Fluoride Content, a major Health Hazard
Article Toxicological effects of Camellia sinensis (green tea): A review
Catechins are substances naturally present in green tea, the most abundant of which is epigallocatechin gallate (EGCG). In its safety assessment, EFSA looked at possible links between the consumption of EGCG in green tea infusions and food supplements and liver damage:
https://www.efsa.europa.eu/en/efsajournal/pub/5239
Dear Dr. Sikandar Hayat Khan
This topic was discussed recently on this platform. Please have a look at this link.
https://www.researchgate.net/post/Green_tea_we_all_know_the_benefits_of_green_tea_Is_green_tea_harmful_to_our_health
Thanks!
I am no expert on this but I would say "Green tea can make you evergreen"!!!
Everything has some effects, good and bad; some have been studied, some not!
in this study i use green tea to diet of quail, the birds that treated with green tea reduced in feed intake and maintained body weight in standard levels. this result may be useful to who suffer from obesity.
Conference Paper Effect of Using Green or Black Tea Powder in the Local Japan...
drinking tea is considered mostly safe for adults, there are a few side effects to keep in mind. Most of the side effects of green tea consumption can be avoided by consuming only moderate amounts. Certain individuals with sensitivities to ingredients in green tea should also avoid this beverage. The main compound in green tea that causes reactions in sensitive individuals is caffeine.and the side effect of green tea includs:
Stomach Problems, Headaches, Problems Sleeping, Anemia and Iron Deficiency, Vomiting, Dizziness and Convulsions,
Bleeding Disorders, Liver Disease, Irregular Heartbeat and High Blood Pressure
May be some negative effect but advantages of green tea is vast.
Good question. I would say excess of anything can be harmful. Drinking a few cups a day and that not consuming the same brand consistently would be a good idea, particularly (1) when we don't know about its side effects and (2) when we are living in a world of brands and deceptive claims about a vast majority of them.
- Stomach Problems. Green tea contains tannins that can increase the amount of acid in your stomach. ...
- Headaches. Green tea can cause headaches in certain individuals since it contains caffeine. ...
- Problems Sleeping. ...
- Anemia and Iron Deficiency. ...
- Vomiting. ...
- Dizziness and Convulsions. ...
- Bleeding Disorders. ...
- Liver Disease.
1. Stomach Problems
Green tea contains tannins that can increase the amount of acid in your stomach. Excess acid can lead to digestive issues including constipation, acid reflux, and nausea. Brewing green tea with water that is too hot can exacerbate these side effects. Brew your green tea with water between 160 and 180 F.
Green tea can also cause diarrhea when consumed in large amounts. Caffeine produces a laxative effect as it stimulates the colon muscles to contract and release more frequently. This results in more frequent trips to the bathroom and can cause upset stomach. If you suffer from irritable bowel syndrome, avoid green tea.
To avoid these side effects, do not drink green tea on an empty stomach. Instead, consume green tea after each meal. If you suffer from acid reflux disease, stomach ulcers, avoid green tea since it can increase acidity.
2. Headaches
Green tea can cause headaches in certain individuals since it contains caffeine. People who suffer from migraines can consume green tea occasionally. However, you should avoid drinking green tea every day if you suffer from daily headaches. If you have caffeine sensitivity, avoid drinking green tea.
3. Problems Sleeping
Green tea contains two compounds that are antithetical to sleep: l-theanine and caffeine. Green tea contains only small amounts of caffeine, but it is still not recommended for use before bed. This is due to the fact that chemical compounds in green tea prevent the release of hormones such as melatonin, which aid in sleep. Green tea also contains l-theanine a chemical that helps to induce calm, but also increase alertness and focus. This can lead to a difficulty falling asleep if taken before bed. Avoid these side effects and consume green tea no later than 5 hours before bedtime.
4. Anemia and Iron Deficiency
Green tea contains antioxidants that hinder the iron absorption in the human body. This side effect can be a particularly dangerous for people who suffer from anemia or other disease where iron deficiency is present. To avoid this side effect, add lemon to your tea. The vitamin C in lemon promotes iron absorption, counteracting this side effect. As a precaution, avoid green tea if you have anemia.
5. Vomiting
Excess amounts of green tea can lead to nausea and vomiting. Avoid consuming more than 4 cups of green tea each day if you are a seasoned tea drinker. If you're just starting out with green tea, start with 1 or 2 cups per day and monitor your reaction. Only increase consumption if you experience no side effects.
apart from above
6. Dizziness and Convulsions
The caffeine in green tea can cause you to feel dizzy or lightheaded when consumed in large amounts. Caffeine decreases blood flow to the brain and central nervous system, resulting in motion sickness. In rare cases, consumption of green tea can lead to convulsions or confusion. In some cases, green tea consumption can also increase tinnitus, known as ringing in the ears. If you suffer from tinnitus, avoid drinking green tea. Always drink green tea in moderate amounts and avoid if you are sensitive to caffeine.
7. Bleeding Disorders
In rare cases, green tea can trigger bleeding disorders. Compounds in green tea decrease levels of fibrinogen, a protein that helps clot blood. Green tea also prevents the oxidation of fatty acids, which can lead to thinner blood consistency. If you suffer from a blood clotting disorder, avoid drinking green tea.
8. Liver Disease
Green tea supplements and high consumption of green tea can lead to liver damage and disease. Experts believe this is due to a build-up of caffeine that can stress the liver. To avoid this side effect, avoid consuming more than 4 to 5 cups of green tea every day.
9. Irregular Heartbeat and High Blood Pressure
Green tea intake can increase high blood pressure, making it a dangerous beverage if you suffer from heart disease. This side effect is rare and more research is needed to examine the exact compounds behind the blood pressure increase. If you suffer from heart disease, seek medical advice from your healthcare professional before consuming green tea.
10. Bone Health
Excess consumption of green tea increases the risk of bone disease such as osteoporosis in sensitive individuals. Compounds in green tea inhibit the absorption of calcium, resulting in a deterioration of bone health. Limit your intake to 2 to 3 cups of green tea if you are predisposed to bone disease. If you consume more than that, make sure to take a calcium supplement to support bone health.
11. Risks for Pregnancy and Child Use
Tannins, caffeine, and tea catechins have all been linked to increased risks during pregnancy. Experts say that green tea in small amounts — no more than 2 cups per day — is safe during pregnancy and breastfeeding. Caffeine is passed through breast milk to infants so monitor your intake in coordination with your physician. Drinking more than 2 cups per day can lead to miscarriage and birth defects in children. Make sure to keep your caffeine intake below 200 milligrams per day.
Sure, there are two sides to everything. Green tea has both its advantages and disadvantages. However, the advantages are more then its disadvantages. Please refer to the following link: Advantages and Disadvantages of Green Tea -
https://ihelpf9.com/advantages-and-disadvantages-of-green-tea/
Dear Nihada Ahmetovic Arvind Singh
What could be the possible association between green tea and thyroid hormones?
Regards
Anemia and Iron Deficiency
Green tea contains antioxidants that hinder the iron absorption in the human body. This side effect can be a particularly dangerous for people who suffer from anemia or other disease where iron deficiency is present. To avoid this side effect, add lemon to your tea. The vitamin C in lemon promotes iron absorption, counteracting this side effect. As a precaution, avoid green tea if you have anemia.
Bone Health
Excess consumption of green tea increases the risk of bone disease such as osteoporosis in sensitive individuals. Compounds in green tea inhibit the absorption of calcium, resulting in a deterioration of bone health. Limit your intake to 2 to 3 cups of green tea if you are predisposed to bone disease. If you consume more than that, make sure to take a calcium supplement to support bone health.
yes if you are bieng treated for autoimmune hepatitis with azatiopine gree tea is toxic
Any type of food /drink when analyzed will vary according to the method of preparation, moderation in intake of any food /beverage required, the side effects vary between individuals
@ Dr. Sikandar Hayat Khan
Catechin present in green tea behaves as antithyroid agent, therefore the consumption of green tea at high dose could alter thyroid function adversely.
https://www.banglajol.info/index.php/JBSP/article/viewFile/22807/15690
interesting and good query that provoked valuable and informative replies and comments from our RG colleagues
Dear dr Sikandar Hayat Khan
Catechin present in green tea extract might behave as antithyroid agent and possibly the consumption of green tea at high dose could alter thyroid function adversely:
Article Goitrogenic/antithyroidal potential of green tea extract in ...
Article Catechin induced modulation in the activities of thyroid hor...
Article Effect of different doses of un-fractionated green and black...
Irritable bowel syndrome (IBS): It can worsen diarrhea and might worsen symptoms of IBS.
interesting and good query that provoked valuable and informative replies and comments from our RG colleagues
Chamomile tea is a green tea with benefits to the stomach since ancient times and no known bad effects. I would not trust any modern green teas that are flooding the markets.
Well!!!! As tea green tea doesn’t have sife effects bit definitely drinking too much is like drinking too much water as making your kidneys to work more. And since we all know excess of everything is bad!!!
Problems Sleeping
Green tea contains two compounds that are antithetical to sleep: l-theanine and caffeine. Green tea contains only small amounts of caffeine, but it is still not recommended for use before bed. This is due to the fact that chemical compounds in green tea prevent the release of hormones such as melatonin, which aid in sleep. Green tea also contains l-theanine a chemical that helps to induce calm, but also increase alertness and focus. This can lead to a difficulty falling asleep if taken before bed. Avoid these side effects and consume green tea no later than 5 hours before bedtime.
Dear Djaafar Zemali
Can you confirm my interpretations please. I use green tea before sleeping.
So you are to say that green tea may not be a good idea before u intend to sleep????
And you can remain calm but sleepless????
Regards
as achemist there are three major causes of damage caused by large amounts of green tea or its extracts:
its content of caffeine.
Its content is aluminum: tea can be heavily ingested to the accumulation of aluminum in the body,
the effect of polyphenols on the absorption and utilization of iron, as green tea catechins act on iron binding, reducing the quantity available in the body.
This does not mean to leave drinking green tea but do not overdo it
Dear@Noor
So three lethal chemicals in green tea:
1- caffeine
2- aluminum:
3- polyphenols : can lead to iron deficiency
Thanks a lot dear
Any special category you can suggest/btand name with max quantity defined?
Regards
Green Tea Side Effects
Stomach Problems. Green tea contains tannins that can increase the amount of acid in your stomach. ...
Headaches. Green tea can cause headaches in certain individuals since it contains caffeine. ...
Problems Sleeping. ...
Anemia and Iron Deficiency. ...
Vomiting. ...
Dizziness and Convulsions. ...
Bleeding Disorders. ...
Liver Disease.
Stomach Problems
Green tea contains tannins that can increase the amount of acid in your stomach. Excess acid can lead to digestive issues including constipation, acid reflux, and nausea.
Stomach Problems
Green tea contains tannins that can increase the amount of acid in your stomach. Excess acid can lead to digestive issues including constipation, acid reflux, and nausea.
I have been studying the application of green tea extracts, recently, and I am a little bit surprised about the side effects attributed to these substances in this thread (unfortunately, no references are given). I was able to find an interesting review article in the renowned journal "Toxicology Letters" (2017) and there it says: "While some of animal toxicity studies with bolus administration of green tea extracts and case reports indicate concerns for liver injury after consuming green tea catechins with dietary supplements, green tea-based food supplements are considered safe at intake up to 300 mg
EGCG/person/day based on the absence of liver toxicity in many well performed clinical studies. I have also searched for IBS and diarrhea and cannot confirm the concerns mentioned here. Please feel free to take a look at the article here Article Safety assessment of green tea based beverages and dried gre...
headache
nervousness
sleep problems
vomiting
diarrhea
irritability
irregular heartbeat
tremor
heartburn
dizziness
ringing in the ears
convulsions
and confusion