Hello! This is Goencha. It's been extremely hot every day... Summer is finally here! On a hot day, a glass of cold green tea tastes amazing! But did you know that a cup of green tea actually has many beneficial effects on the body?
We'll explain in simple terms the benefits of drinking cold green tea in the summer. For example, we'll explain in detail five great benefits, such as preventing heatstroke, boosting motivation, strengthening the body's defenses, supporting dieting, and regulating the stomach. Incorporate cold green tea into your daily routine and get through the summer in good health!
For seasonal greetings, we recommend chayori, a Japanese summer drink!
You can easily make delicious cold-brewed green tea!
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Why drinking cold green tea is good for your health in the summer
The intense heat of summer in Japan continues. During this season when it's easy to get sick, cold green tea not only quenches your thirst, but also has other beneficial effects. A cool cup of green tea is packed with various benefits that will help keep you healthy during the summer.
Beat the summer heat! The refreshing feeling of cold green tea and the importance of hydration
In the summer, we sweat a lot, which can easily cause our bodies to lose fluids, making it very important to hydrate frequently. Cold green tea gently cools down the body's heat and has a refreshing taste. This makes drinking it feel good, and it naturally helps you stay hydrated. It's smooth and easy to drink, making it the perfect way to combat dehydration in the summer.
In addition, green tea not only contains water, but also small amounts of minerals that tend to be lost through sweat, which greatly improves the quality of your hydration.
The mechanism by which green tea ingredients help maintain good health in the summer
Green tea helps maintain good health in the summer because it contains many beneficial ingredients. Here we will introduce the main ingredients and their functions.
| Main ingredients | Expected role in summer health |
|---|---|
| Catechin | Its antioxidant properties protect the body from summer UV damage and stress, and also help maintain immune function. |
| Caffeine | Its moderate stimulating effect helps reduce summer drowsiness and fatigue. It also helps maintain concentration. |
| Theanine | It is expected to have a relaxing effect and help relieve irritability and stress caused by the summer heat. It also reduces the stimulating effects of caffeine. |
| Vitamin C | An antioxidant vitamin that helps protect against UV rays in the summer and recover from fatigue. |
These ingredients work in balance to ease the strain that heat puts on the body and mind, helping you to spend the summer in good health.
Summer Cold Brew Festival is now underway! The tea novelty is “Kyoto Gyokuro’s Goen Tea”
What is Kyoto Gyokuro’s Goen Tea?
" Kyoto Gyokuro's Goen Tea " is a tea shop that delivers fun tea from Kyoto with the concept of "making tea more fun"! We create plans tailored to your needs, making high-quality tea more accessible and exciting to enjoy.
We value the idea that "tea connects people," and we have a wide selection of products that are perfect for everyday tea time, as well as gifts for special people and corporate novelties. Particularly popular as corporate novelties are products that can be personalized with original designs or names !
"Thank you," "Congratulations," "I look forward to working with you in the future!"
Why not convey these feelings through tea?
Here are some recommended novelties that can convey a message!
A special tea packed with feelings. Create a one-of-a-kind tea with an original greeting tea design. Custom order
Speaking of summer, cold brew is the best! So, we will be holding the "#ColdBrewGoenTeaCampaign" from Sunday, July 20th to Tuesday, August 19th, 2025!!! This time, the campaign will be held simultaneously on Instagram and X! Click here
for campaign details ! We look forward to receiving many applications!
5 Health Benefits of Cold Green Tea
Cold green tea has many beneficial effects on the body and has a positive impact on health. Here we will introduce in an easy-to-understand manner the five wonderful effects of drinking cold green tea.
Cold green tea helps with hydration and heatstroke prevention in the summer
During the hot summer months, frequent hydration is key to preventing heatstroke. Cold green tea not only quenches thirst but also cools the body from the inside, making it the perfect summer drink. It also contains a small amount of minerals that tend to be lost through sweat, helping to restore balance to the body.
However, green tea contains caffeine, which can make you need to go to the bathroom more often, so be careful not to drink too much. Drinking it in moderation, combining it with water or other drinks, can be very helpful in managing your health in the summer.
Cold green tea improves concentration and has a refreshing effect
The caffeine in cold green tea helps to wake you up and improve your concentration. Theanine, a compound in green tea, also has a calming effect, and when consumed together with caffeine, it helps maintain your concentration.
When you feel dizzy from the heat or when you want to concentrate on work or study, drinking iced green tea will make you feel refreshed and boost your motivation.
Catechin contained in cold green tea improves immunity and prevents bad breath
Catechins, which are found in large amounts in green tea, are known to have the power to keep the body healthy. In addition to helping to restore balance in the body, catechins also have the power to ward off bacteria and viruses, so they may be useful in preventing colds and influenza.
Furthermore, catechins also work to suppress the growth of bacteria in the mouth, which can be expected to help prevent bad breath. Drinking cold green tea after a meal will help refresh your mouth and also help prevent bad breath.
Diet support effects you can expect from cold green tea
Cold green tea is also recommended for those who are trying hard to lose weight. The catechins and caffeine contained in green tea are said to help burn fat in the body and increase basal metabolism. In particular, drinking it during a meal may help prevent a sudden rise in blood sugar levels after eating.
Also, since green tea has almost no calories, drinking it instead of juice will help you avoid taking in extra calories. Simply replacing your usual hydration with cold green tea may help with your diet.
Cold green tea improves your intestinal environment and combats summer fatigue
The environment inside your stomach (intestinal environment) is closely related to your physical health. The catechins contained in green tea are said to increase the number of "good" bacteria that have beneficial effects on the body and suppress the activity of "bad" bacteria. When the balance inside your stomach is restored in this way, you can properly absorb the nutrients from food and it becomes easier to maintain your immune system.
In the summer, the heat can cause a loss of appetite and upset the stomach and intestines, making you more susceptible to summer fatigue. However, if you keep your stomach in good condition, you can digest food properly and keep your body healthy. By incorporating cold green tea into your daily life, you can take measures to prevent summer fatigue from within your body.
Tips for enjoying cold green tea effectively
The difference between hot and cold green tea and the advantages and disadvantages of cold green tea
The release of green tea's ingredients varies greatly depending on how it is brewed. Hot and cold tea have different effects on the body and tastes different. Cold green tea made with "cold brewing" in particular has different benefits than hot green tea, so it's a good idea to learn about the characteristics of each and use them wisely.
Hot green tea is brewed with hot water, which releases a lot of compounds such as catechins and caffeine. These compounds can give tea a slightly bitter and astringent taste, but they are said to have protective effects on the body and clear the mind.
On the other hand, cold green tea, especially cold brewed green tea, is brewed slowly at a low temperature, so it does not produce many bitter or astringent components. Instead, it produces a lot of theanine, which has a relaxing effect, resulting in a gentle, sweet, and mellow taste. It is also gentle on the stomach and has low stimuli.
Please refer to the table below for more information.
| item | Hot green tea | Cold green tea (cold brew) |
|---|---|---|
| Characteristics of extracted ingredients | Catechin and caffeine are easily released | Theanine is released in large amounts. Catechin and caffeine are low. |
| Taste characteristics | Bitterness, astringency, and aroma are prominent | Mellow, sweet and savory |
| Expected effects | Awakening, sterilization, relaxation (fragrance) | Relaxation, improved concentration, reduced gastrointestinal burden |
| Suitable Scenes | After a meal, when you want to refresh yourself, during the cold season | Hydration, before bed, in hot weather, when your stomach is sensitive |
The benefits of cold green tea
- Rich in theanine, it has a relaxing effect.
When brewed in water, the theanine components remain, helping to calm the mind and make it easier to concentrate. - It has little bitterness and is easy to drink.It
does not contain much of the catechin or caffeine that cause bitterness, so it is easy to drink even for people who don't like bitter things and children.
It contains little caffeine or bitter ingredients, so it is easy on the stomach and can be safely consumed even by those with weak stomachs.- Perfect for hydration
It's refreshing, easy to drink, and easy to drink in large quantities, making it perfect for hydration in the summer.
Disadvantages of cold green tea
- When you want to wake up from sleepiness
, cold-brewed green tea with its low caffeine content may not be enough.
Be careful when you are not feeling well, as you may end up cooling your body (stomach) too much.- Be careful not to drink too much
. As with any drink, drinking too much can put a strain on your stomach.
How to brew delicious cold green tea and when to drink it
To enjoy cold green tea even more, it's important to know how to brew it deliciously and choose the right time to drink it. Cold-brewed green tea, in particular, brings out the umami flavor of green tea and the beneficial compounds in it in a balanced way.
How to brew delicious cold green tea (cold brewed green tea)
Cold-brewed green tea is brewed slowly over time, which brings out the sweetness and flavor that is unique to green tea and reduces the bitterness and astringency.It also contains little caffeine, so you can drink it safely even at night.
For preparing tea leaves
for cold brewing, we recommend deep-steamed sencha, kukicha, and gyokuro. These tea leaves are rich in umami and have the distinct feature of bringing out their flavor even in water.
Prepare the water:
Use mineral water (soft water) or tap water that has been boiled and cooled. Hard water with a high mineral content can change the taste of the tea.
How to brew
- Put tea leaves into a clean water cooler or pitcher. (Guideline: 10-15g of tea leaves per 1 liter of water)
- Slowly pour in the water and stir gently to moisten the tea leaves.
- Cover and place in the refrigerator for 2-6 hours before brewing. Leaving it overnight will enhance the flavor even more.
- Once the brewing is complete, strain the tea leaves. If you leave the tea leaves in the brewer for too long, they will become bitter and astringent over time.
point
- Please adjust the brewing time according to the type of tea leaves and your preference.
- Once you have made your cold-brewed green tea, keep it in the refrigerator and drink it within 2-3 days.
Best time to drink cold green tea
Cold green tea is a convenient drink that can be used in a variety of situations. To fully appreciate its benefits, we recommend being mindful of when to drink it, and only a little at a time.
By replenishing the fluids lost during sleep after waking up , your body will wake up smoothly. Cold-brewed green tea is gentle on the stomach and absorbs easily into the body.- It's important to drink plenty of fluids after sweating during and after exercise
. Cold green tea is refreshing and easy to drink, leaving your body feeling refreshed. - Theanine, a component found in green tea, has the ability to calm you down and help you concentrate while you work or study
. It's also perfect for those times when too much caffeine can be a problem.
It helps to clear away oily food and reduce bad odors during and after meals , making it especially refreshing to drink after a greasy meal.
When you have no appetite due to the heat or feel sluggish, cold green tea is a great way to combat summer fatigue . It's smooth and easy to drink. It's packed with not only water but also vitamins and minerals, helping to keep your body healthy.
When to avoid cold green tea
- Green tea brewed before bed
has less caffeine, but it is not completely caffeine-free. If you are sensitive to caffeine, it is best to avoid drinking it before bed. - If you don't want to cool down your body
, drinking lots of cold drinks when you're prone to feeling cold or when you're not feeling well can make your body too cold. In such cases, we recommend letting the drink return to room temperature a little before drinking it, or drinking warm green tea instead.
summary
With summer fast approaching, cold green tea is a reliable drink that supports our bodies in many ways. It not only helps with hydration and heatstroke prevention, but also boosts concentration, clears the mood, boosts immunity with catechins, prevents bad breath, supports dieting, and regulates the stomach, among many other benefits.
By learning the differences between cold and hot green tea and being mindful of the tricks for brewing it deliciously and the right timing to drink it, you can truly experience the appeal of cold green tea. This summer, try incorporating cold green tea into your daily routine to stay healthy and comfortable.
