Drinking Too Much Of Tea Causes Side Effects

Nausea

Tannins in tea leaves are responsible for the bitter, dry taste of tea. The astringent nature of tannins can also irritate digestive tissue, potentially leading to uncomfortable symptoms, such as nausea or stomach ache.

If you notice any of these symptoms after drinking tea, you may want to consider reducing the total amount you drink at any one time.

The amount of tea required to have this effect can vary dramatically depending on the person.

The causes of vomiting differ according to age. For children, it is common for vomiting to occur from a viral infection, food poisoning, milk allergy, motion sickness, overeating or feeding, coughing, or blocked intestines and illnesses in which the child has a high fever.

Poor Sleep

Melatonin is a hormone that signals your brain that it’s time to sleep. Some research suggests that caffeine may inhibit melatonin production, resulting in poor sleep quality. 

Some studies have found that even just 200 mg of caffeine consumed 6 or more hours before bedtime could negatively affect sleep quality, whereas other studies have observed no significant effect 

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Inadequate sleep is linked to a variety of mental issues, including fatigue, impaired memory, and reduced attention span. What’s more, chronic sleep deprivation is associated with an increased risk of obesity and poor blood sugar control 

Caffeine Dependence

Caffeine is a habit-forming stimulant, and regular intake from tea or any other source could lead to dependence.

Symptoms of caffeine withdrawal may include headache, irritability, increased heart rate, and fatigue Trusted Sourc

The level of exposure required to develop dependence can vary significantly depending on the person. Still, some research suggests it could start after as few as 3 days of consecutive intake, with increased severity over time 

Caffeine content can range from as much as 160 milligrams in some energy drinks to as little as 4 milligrams in a 1-ounce serving of chocolate-flavored syrup. Even decaffeinated coffee isn't completely free of caffeine. Caffeine is also present in some over-the-counter pain relievers, cold medications, and diet pills

Headaches

Routine consumption of caffeine from tea may contribute to recurrent headaches.

Some research suggests that as little as 100 mg of caffeine per day could contribute to daily headache recurrence, but the exact amount required to trigger a headache can vary based on an individual’s tolerance Trusted Sourc

Tea tends to be lower in caffeine than other popular types of caffeinated beverages, such as soda or coffee, but some types can still provide as much as 60 mg of caffeine per cup (240 ml)Trusted Sourc

If you have recurrent headaches and think they may be related to your tea intake, try reducing or eliminating this beverage from your diet for a while to see if your symptoms improve

Dizziness

Dizziness is one of the more common reasons adults visit their doctors. Frequent dizzy spells or constant dizziness can significantly affect your life. But dizziness rarely signals a life-threatening condition

This symptom is typically associated with large doses of caffeine, typically those greater than 400–500 mg, or approximately 6–12 cups (1.4–2.8 liters) worth of tea. However, it could occur with smaller doses in people who are particularly sensitiveTrusted Sourc

Generally, it’s not recommended to consume that much tea in one sitting. If you notice that you often feel dizzy after drinking tea, opt for lower caffeine versions or consult your healthcare provider.

Dizziness has many possible causes, including inner ear disturbance, motion sickness and medication effects. Sometimes it's caused by an underlying health condition, such as poor circulation, infection or injury.

Reduced Iron Absorption

Tannins can bind to iron in certain foods, rendering it unavailable for absorption in your digestive tract.

Tea is a rich source of a class of compounds called tanninsThe exact amount of tannins in tea can vary considerably depending on the type and how it’s prepared. That said, limiting your intake to 3 or fewer cups (710 ml) per day is likely a safe range for most people

Drinking tea could cause iron deficiency, if you drink a lot of tea with meals and don't consume adequate iron. Studies have shown that tea—notably black tea, but also green—decreases the absorption of iron, especially nonheme iron, the kind found in plant foods (heme iron comes from animal-derived foods).

Compounds in tea called tannins can combine with nonheme iron and make it less available for absorption. Drinking tea with a meal can decrease iron absorption by 50% or more, and that may increase the chances of iron deficiency. Putting lemon juice in the tea helps counter the negative effect by increasing iron absorption. Coffee may also decrease iron absorption, though not as much as tea.

Even though tea inhibits iron absorption, you still absorb some iron. But if you're a premenopausal woman, for instance, and drink tea with every meal, or drink many cups a day, while eating minimal amounts of iron-containing food, it's possible that the tea could promote iron deficiency. If you have an iron deficiency, or are at high risk for it, wait at least an hour after a meal before drinking tea.

Keep in mind: The body is able to use only a portion of the nutrients it takes in, an amount determined by many variables. Interactions among nutrients and other compounds are a major factor. Thus, tannins in tea may decrease iron absorption, but vitamin C—as in lemon juice—increases it. To get the nutrients you need, you have to balance the positives and negatives. Although drinking a lot of tea may cause iron deficiency, tea in moderation can be part of a healthy diet.

Heartburn

Caffeine may also contribute to an increase in total stomach acid production

The caffeine in tea may cause heartburn or aggravate preexisting acid reflux symptoms

Of course, drinking tea may not necessarily cause heartburn. People respond very differently to exposure to the same foods.

That said, if you routinely consume large quantities of tea and frequently experience heartburn, it may be worthwhile to reduce your intake and see whether your symptoms improve.

Pregnancy Complications

Data on the dangers of caffeine during pregnancy is mixed, and it’s still unclear exactly how much is safe. However, most research indicates that the risk of complications remains relatively low if you keep your daily caffeine intake under 200–300 mgome people prefer to drink caffeine-free herbal teas in place of regular tea to avoid caffeine exposure during pregnancy. However, not all herbal teas are safe to use during pregnancy.Exposure to high levels of caffeine from beverages like tea during pregnancy may increase your risk of complications, such as miscarriage and low infant birth weight