Green Tea Caffeine: How Much, Best Timing & Who Should Limit It

Green tea can feel gentler than a strong coffee, but that does not mean it is caffeine-free.

Green tea naturally contains caffeine. How much you ultimately consume depends on the tea, serving size, preparation and the other caffeinated foods and drinks in your day.

That makes caffeine less about finding one perfect number and more about understanding your own routine.

Does Green Tea Have Caffeine?

Yes.

Green tea comes from the tea plant Camellia sinensis and naturally contains caffeine.

The National Center for Complementary and Integrative Health notes that green tea consumed as a beverage contains caffeine.

How Much Caffeine Is in Green Tea?

There is no single caffeine number that applies to every cup of green tea.

The U.S. Food and Drug Administration lists approximately 37 mg of caffeine in a typical 12-fluid-ounce serving of green tea, while also explaining that caffeine levels in specific products can vary.

The important word is typical.

Different teas, quantities and preparation methods can produce different caffeine levels.

Does a 210 ml HI TEA Cup Contain 37 mg of Caffeine?

That should not be assumed.

The FDA figure refers to a typical 12-fluid-ounce green tea beverage, not specifically to HI TEA.

Each HI TEA serving cup holds approximately 210 ml and contains approximately 1.7 g of tea blend.

But those specifications alone are not enough to calculate an exact caffeine amount.

Until a flavour-specific caffeine value has been verified through appropriate testing, it is more accurate to say:

HI TEA uses green tea and therefore naturally contains caffeine.

Why Can Caffeine Vary Between Green Teas?

Tea is an agricultural product, so caffeine does not behave like a fixed artificial ingredient added at exactly the same level to every cup.

The amount can vary with factors such as:

• The tea material used
• The amount of tea
• Serving size
• Water temperature
• Preparation time
• The specific blend

That is why generic green tea averages should not automatically be presented as exact HI TEA values.

Is Green Tea Caffeine-Free?

Regular green tea is not caffeine-free.

Even products described as decaffeinated may still contain some caffeine.

The FDA explains that decaffeinated coffees and teas generally contain less caffeine than their regular versions, but “decaffeinated” does not necessarily mean zero caffeine.

Does HI TEA Chamomile Contain Caffeine?

HI TEA Chamomile is part of the HI TEA green tea range.

The presence of chamomile flavour does not automatically make the underlying green tea caffeine-free.

So if you are specifically trying to avoid caffeine, do not assume that the word “Chamomile” alone means a product contains none.

Does Jasmine Green Tea Have Caffeine?

Yes, when jasmine is combined with a green tea base, the tea still naturally contains caffeine.

Jasmine primarily changes the flavour and aroma experience.

It does not automatically remove the caffeine naturally present in green tea.

What About Mint, Ginger, Lemon and Hibiscus?

The same principle applies across flavoured green teas.

Adding a flavour ingredient does not automatically make the underlying green tea caffeine-free.

HI TEA flavours including Mint, Ginger, Lemon, Lemon & Honey, Jasmine, Hibiscus, Chamomile and Kashmiri Kahwa should therefore be considered within your overall green tea and caffeine routine.

How Much Caffeine Is Too Much?

Caffeine tolerance differs considerably from person to person.

The FDA cites 400 mg of caffeine per day as an amount not generally associated with negative effects for most adults.

However, the FDA also stresses that sensitivity varies depending on factors such as medications, certain medical conditions and individual response.

That 400 mg figure is therefore not a target you need to reach.

Someone may feel perfectly comfortable well below it, while another person may notice caffeine effects at a much lower intake.

What Are Signs You May Be Having Too Much Caffeine?

According to the FDA, too much caffeine can be associated with symptoms including:

• Jitters
• Anxiety
• Sleep disruption or insomnia
• Increased heart rate
• Heart palpitations
• Upset stomach
• Nausea
• Headache

If caffeine repeatedly makes you uncomfortable, reducing your intake or discussing it with a health professional may be appropriate.

Is Green Tea Lower in Caffeine Than Coffee?

Typical servings of green tea generally contain less caffeine than typical servings of brewed coffee.

For context, the FDA lists typical caffeine levels for a 12-fluid-ounce serving as:

These are general reference values rather than guaranteed amounts for individual products.

When Is the Best Time to Drink Caffeinated Green Tea?

There is no single clock time that works for everybody.

A useful approach is to place caffeinated tea at times when it fits your routine without interfering with sleep.

Common tea moments include:

• Morning
• Mid-morning
• After lunch
• During an afternoon work break

Your last green tea of the day may need to move earlier if you are sensitive to caffeine.

Read: Best Time to Drink Green Tea: Morning, After Meals or Evening? .

Can You Drink Green Tea in the Evening?

Some people comfortably enjoy green tea later in the day.

Others find that even a moderate amount of caffeine affects their sleep.

If you notice that evening tea makes it harder to fall asleep or changes your sleep quality, move your last green tea earlier.

Read: Green Tea in the Evening: Timing, Caffeine & Calm Tea Options .

Does the Time You Drink Caffeine Matter?

For many people, yes.

A cup that feels completely comfortable during the morning may feel very different close to bedtime.

This is one reason caffeine advice should not be reduced to only a daily milligram number.

Timing + total intake + personal sensitivity all matter.

Can You Drink Green Tea Every Day?

Green tea is widely consumed as an everyday beverage.

NCCIH reports no safety concerns for green tea consumed as a beverage by adults, while noting that it contains caffeine.

Green tea beverages should also be distinguished from concentrated green tea extracts, which have different safety considerations.

Green Tea Beverage vs Green Tea Extract

These are not the same thing.

A normal prepared green tea beverage contains tea infused in water.

Green tea extract supplements may contain much more concentrated amounts of particular tea compounds.

NCCIH notes that uncommon cases of liver injury have been reported primarily with green tea extracts in tablet or capsule form.

HI TEA is prepared as a green tea beverage, not a concentrated green tea extract supplement.

What If You Take Medicines?

Green tea and green tea extracts may interact with some medicines.

NCCIH specifically notes interactions involving certain medicines and advises people using medications to discuss herbal products or supplements with their health care provider.

If you have a medical condition, take regular medication or have been advised to restrict caffeine, your own health professional is the appropriate person to guide your intake.

What About Pregnancy or Breastfeeding?

Pregnancy and breastfeeding can change caffeine recommendations.

Both the FDA and NCCIH recommend discussing caffeine intake with a health care professional if you are pregnant, trying to become pregnant or breastfeeding.

Green tea contributes to total daily caffeine intake and should therefore be counted alongside coffee, chocolate, soft drinks and other caffeine sources.

Does Caffeine Only Come From Coffee and Tea?

No.

Your total daily caffeine can come from several sources.

The FDA notes caffeine may be found in:

• Coffee
• Tea
• Chocolate
• Soft drinks
• Energy drinks
• Some foods
• Some dietary supplements
• Some over-the-counter medicines

Therefore, three cups of tea may mean something very different for someone who drinks no coffee compared with someone who also drinks several coffees and an energy drink.

How Many Cups of Green Tea Can You Drink?

There is no universal number every adult needs to drink.

Instead of chasing an ideal cup count, consider:

• Your overall caffeine intake
• Your caffeine sensitivity
• Your sleep
• Other caffeinated drinks
• Any medicines or relevant health advice

Read: How Many Cups of Green Tea a Day? A Practical Daily Guide .

Does the Second HI TEA Brew Still Contain Caffeine?

A second brew should not be assumed to be caffeine-free.

The same tea blend has already been infused once, so the second serving will naturally differ from the first, but it still comes from the same caffeinated green tea blend.

Read: Can You Brew Green Tea Twice? How HI TEA’s Second Brew Works .

How HI TEA Fits Into a Caffeine-Aware Routine

Each HI TEA serving uses a ready-to-use 210 ml cup containing approximately 1.7 g of tea blend beneath a built-in non-woven cotton filter.

Because the green tea naturally contains caffeine, think of each serving as part of your overall daily caffeine routine rather than in isolation.

You can then choose the flavour and tea moment that best fits your day.

A Simple Tea Timing Example

This is an example of routine planning, not a required schedule.

The Most Important Caffeine Rule

Do not let a generic internet number override how caffeine actually affects you.

If one or two caffeinated drinks feel comfortable, you do not need to increase them simply because another person drinks more.

If caffeine causes jitters or disrupts your sleep, adjusting your timing or intake makes more sense than chasing a theoretical “perfect” number.

Frequently Asked Questions

Does green tea contain caffeine?

Yes. Green tea naturally contains caffeine.

How much caffeine is in green tea?

The FDA lists about 37 mg as a typical amount in a 12-fluid-ounce green tea serving, but actual caffeine levels vary between products and preparations.

How much caffeine is in one HI TEA cup?

HI TEA naturally contains caffeine because it uses green tea. An exact HI TEA caffeine value should only be stated after it has been specifically verified for the product.

Is HI TEA caffeine-free?

No. HI TEA uses green tea, which naturally contains caffeine.

Is HI TEA Chamomile caffeine-free?

Do not assume so. HI TEA Chamomile belongs to the green tea range, and the chamomile flavour does not automatically remove caffeine from the green tea base.

Does Jasmine green tea contain caffeine?

Yes. Jasmine green tea still contains caffeine when jasmine is combined with a green tea base.

Can I drink green tea at night?

Some people can, while caffeine-sensitive people may find that late green tea interferes with sleep. Adjust your timing according to your response.

How much caffeine is too much?

The FDA cites 400 mg per day as an amount not generally associated with negative effects for most adults, but individual sensitivity varies considerably.

Can I drink green tea every day?

NCCIH reports no safety concerns for green tea consumed as a beverage by adults, while noting that green tea contains caffeine.

Where can I learn more about HI TEA?

Visit the HI TEA FAQ Hub or read What Is HI TEA?.