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Welcome to Doctor King & Company, London.



Dr King has answered some questions about matcha and Doctor King® products.


1. What is Matcha?

Matcha is a special finely-milled green tea powder made from shade-grown leaves of the Camellia Sinensis plant. During cultivation, special covers were applied over the plants for three weeks to produce shade, which induces production of chlorophyll, L-theanine and other valuable nutrients in the leaves. Unlike other green teas (where after steeping the tea, the leaves are removed), matcha is whisked with hot water and the entireity is ingested with all its valuable nutrients. 



2. What are the different grades of matcha?

There are 3 main grades of matcha, namely:

  1. Ceremonial Grade Matcha,
  2. Premium Grade Matcha and
  3. Food (Culinary) Grade Matcha.                                                                          


Ceremonial Grade Matcha is very high quality matcha. 

The manufacturer of our Organic Japanese Matcha makes two grades of Ceremonial Grade Matcha called Grade A and B. Our Finest Ceremonial Grade Matcha is 100% Grade A, which is the finest (highest grade). Grade A matcha is made using only the finest young leaves of the Camellia Sinensis plant, which were hand-picked and selected from the top of the plants during the first harvest. Ceremonial Grade Matcha is greener and more nutritious than lower grade matchas.  One reason for this is that lower grade matchas contain more stems and veins than higher grade matchas. Stems and veins are less nutritious than the rest of the leaf. Ceremonial Grade matcha is recommended for whisking with hot water to make matcha tea. If you wish, you can use Ceremonial Grade matcha in a variety of food and drinks.  

Premium grade matcha is high quality matcha. However, it is not as good as Ceremonial Grade. 

Food (Culinary) grade matcha is not as good as Ceremonial or Premium Grade Matcha.

Culinary Grade Matcha is generally used as an ingredient in a variety of food and drinks.

Many companies use these definitions.  However, some companies define the word "premium" differently. Some companies sell "drinking grade matcha", which is better than food grade matcha.


3. What are the benefits of matcha green tea? Why should I consider buying matcha green tea instead of other teas such as regular green tea or black tea?

  1. Matcha is an excellent superfoodIt has a high density of antioxidants. One cup of matcha green tea is equivalent to many cups of regular green tea (in terms of antioxidants and some other valuable nutrients). Research at the University of Colorado at Colorado Springs, USA, indicates that JAPANESE MATCHA GREEN TEA contains 137 times the EGCG (epigallocatechin-3-gallate) antioxidants of a popular green tea called China Green Tips Green Tea (which is currently sold by Starbucks®, the famous coffee shop chain in the UK and USA) (Weiss et al., 2003). Matcha green tea also contains far more antioxidants than regular black tea.
  2. EGCG is a potent antioxidant. Many leading doctors and researchers believe that antioxidants are important in helping protect cells, DNA and other molecules in the body from damaging free radicals, which are a cause of many diseases. Currently, one of the theories to help explain many diseases such as many types of cancer, stroke and cardiovascular disease (including angina and myocardial infarction which is commonly called a ‘heart attack’) is the "Free Radical Theory of Disease".  Therefore, I believe that drinking Organic Japanese Matcha Green Tea everyday, as part of a healthy lifestyle, will help protect against many diseases
  3. Through various mechanisms, Matcha green tea helps protect against many common diseases such as many types of cancer, stroke, cardiovasular disease, hypercholesterolaema ('high cholesterol'), hypertension ('high blood pressure'), Alzheimer's disease, Parkinson's disease and type 2 diabetes. References are available on request.
  4. Matcha Green Tea helps relax the mind due to high levels of L-theanine (a special amino acid). Doctors refer to stressful situations as 'stressors'.  Stressors are risk factors for many health problems.  For example, stressors are a potent risk factor for heart attacks and high blood pressure.  Therefore, in my opinion, drinking matcha green tea on a daily basis should help protect against heart attacks, high blood pressure and other stressor-linked diseases.  L-Theanine has many other benefits e.g. it increases concentration without inducing anxiety.
  5. Matcha Green Tea helps with weight loss. A study showed that drinking matcha green tea regularly increases the speed of metabolism. Matcha green tea is a fat burner as it increases fat oxidation (fat burning).  Matcha green tea has 3 Calories per serving, which is lower than most, if not all, superfoods. It is virtually fat-free and sugar-free. Drinking tea helps you feel fuller. Therefore, matcha green tea is definitely advantageous (as part of a healthy lifestyle) if you wish to achieve weight loss.
  6. Matcha Green Tea is greener than regular green tea.  Our Finest Ceremonial Grade Organic Japnese Matcha has a rich green colour, unlike a well-known brand of organic green tea which I bought from my local supermarket, which was, in fact, brownish in colour. Matcha Green Tea is rich in chlorophyll, which is important in detoxification.
  7. Many people prefer Matcha Green Tea to regular green tea because Matcha Green Tea tastes better than regular green tea, which many people say is bitter or unpleasant. Matcha Green Tea contains more L-theanine than any other type of green tea. One reason why Matcha Green Tea tastes better than regular green tea is that L-Theanine is said to add natural sweetness to the beverage. 
  8. It is practical to introduce Doctor King's® Organic Japanese Matcha into your daily routine and maintain this good habit.  Tea is the most commonly consumed beverage (after water). If you are want a quick way to make matcha green tea, you could try a method which I have called "Contemporary Brewing". Click on the menu entitled "How To Make Doctor King's® Matcha" for details. In my opinion, considering all of the above information (and some information that I have not discussed), Finest Ceremonial Organic Japanese Matcha Green Tea is an excellent superfood and is probably the best superfood to help prevent many major diseases.



4. What are the benefits of buying organic matcha?

ORGANIC food is safe food that you can trust, which is produced in environmentally-friendly organic farms. To be certified organic, products must be grown and manufactured in a manner that adheres to strict standards set by the country they are sold in.

Organic food aims to avoid synthetic pesticides and synthetic chemicals. Recent research at the University of California, Los Angeles, indicates that low level exposure to certain synthetic pesticides and synthetic fungicides is associated with a 2 to 6 fold increase in the risk of Parkinson's Disaese. The research also indicates that as the level of exposure to pesticides increases, the risk of developing Parkinson's Disease increases (Fitzmaurice et al., 2014). One means to lower the risk from pesticide exposure is simply to avoid pesticide exposure where possible. Choosing organic food as much as possible is a step in the right direction.

Organic food is natural i.e. minimally processed.

For more information on "why choose organic" and the benefits of organic food, visit the Soil Association's website:


5. How do I know if a product is organic?

Each organic certification body has its identifier code and symbol. Look for the identifer code with or without the symbol on the packaging.

Here are some examples of symbols of organic certification bodies commonly found on packaging in the UK, EU and USA.

The new UK's Soil Association Certification symbol for products that are certified organic (which can be printed in any colour with permission from the Soil Association) is:



The new European Union (EU) Logo for products that are certified organic is:



The United States Department of Agriculture (USDA) Symbol for products that are certified organic is:



The Japanese Agricultural Standard Symbol for products that are certified organic is:



There are some bogus traders on the internet who claim in the advertisement that they are selling "certified organic matcha" at extremely cheap prices that show images of certificates that are out of date or altered.  Such organic certificates are not valid. If you have doubts about a company's claims that they are certified organic by a particular organic certification body, you could ask the company for their Organic Licence ID issued by the organic certification body and contact the relevant organic certification authority and verify whether they have a licence or not. Our company's Soil Association Organic Licence ID is DA22357. 

For more detailed information on "how do I know it's organic: bogus traders", go to the Soil Association's website:


6. Why do you sell Japanese matcha instead of Chinese matcha?

  • Research at the University of Colorado Colorado Springs indicates that Japanese Matcha contains a phenomenal 137 times the EGCG antioxidants of Starbucks® China Green Tips Green Tea (Weiss et al., 2003)!
  • In general, during matcha green tea manufacture in China, the fresh tea leaves from the Camellia Sinensis plants are pan-fried (to prevent oxidation), which damages some of the heat-sensitive EGCG antioxidants and L-theanine.  Matcha Green Tea manufacture in Japan involves gentle steaming (to prevent oxidation), which occurs at a lower temperature and, therefore, preserves more of the important heat-sensitive micronutrients (References are available on request).
  • Japanese organic standards are high and equivalent to UK, EU and US organic standards.
  • Japan has the perfect climate and conditions for the plants.


7. Is Doctor King's® brand of Organic Japanese Matcha Green Tea safe to drink (in terms of radiation)?

Yes, Doctor King® products are perfectly safe to drink. We have an up-to-date certificate from a laboratory in Japan called Shin Nihon Kentei Kyokai (which is licensed by the Japanese government), which certifies that gamma ray spectrometry shows that gamma radiation was "not detected" from samples of our brand of Finest Ceremonial Organic Japanese Matcha Green Tea and Organic Japanese Matcha Green Tea (Premium Grade) that were sent to the laboratory by the manufacturer. The laboratory analysed specifically for gamma radiation from Caesium-137, Caesium-134 and Iodine-131. Therefore, we would like to reassure our customers that our products are perfectly safe to drink.


8. Is Doctor King® matcha fresh?

Yes. Our matcha is freshly made in Japan to our order every month! Our products are foil-packed for extra freshness. Our products are transported to the UK by air freight (not shipping freight) to ensure that the matcha reaches our customers as quickly as possible.

9. Why does Finest Ceremonial Grade Organic Japanese Matcha cost more than regular green or black tea? Is matcha green tea worth it?

There are a number of reasons why Finest Ceremonial Grade Organic Japanese Matcha Green Tea costs more than ordinary tea. Here are some of the reasons:

1.     Finest Ceremonial Grade Organic Japanese Matcha Green Tea is very high quality and very nutritious green tea. Ceremonial Grade Organic Japanese Matcha Green Tea has been described as the 'King of Green Teas'. It may be the world's finest green tea.

2.     Shading the tea plants for three weeks requires special covers to be applied during cultivation, which requires time and paid workers to do this. Shading is not part of the process of making regular green tea. 

3.     Most farmers pick the finest leaves entirely by hand, which requires time and paid workers to do this.

4.     At the factory, production requires meticulous destemming and deveining of the leaves (to obtain the most nutritious part of the leaves) and special granite stone-grinding to produce matcha. Each stone grinder produces about 30-40 grams of matcha in an hour.  It takes a great deal of skill, time and effort by paid workers to produce matcha.

5.     For the Finest Ceremonial Grade A Matcha, we pay our Associate Company in Japan approximately three times more than that of some of the lower grade organic Japanese matchas available from their company.  One reason for this is that the Finest Ceremonial Grade A Organic Japanese Matcha contains the very best, youngest, sweetest leaves, which have been hand picked and selected from the top of the Camellia Sinensis plant during the first harvest. 

6.     Our Organic Matcha arrives in Great Britain by air freight (which costs far more than shipping freight) to help ensure that our customers get matcha that is as fresh as possible. 

7.     Our products are further certified to UK standards by the largest organic certification body in the UK, Soil Association Certification (the organic licence costs several hundred pounds per year).

Hence, Finest Ceremonial Grade Organic Japanese Matcha Green Tea costs more than regular green or black tea. 

Given that one serving of Japanese matcha green tea (one gram) is equivalent to 137 cups of China Green Tips green tea (in terms of the amount of antioxidants), you may have to buy and drink up to 137 cups of regular China Green Tips green tea to get similar benefit (in terms of antioxidants) to a one gram serving of matcha. Drinking so many cups of regular China Green Tips green tea would be impractical, more expensive and would result in caffeine intoxication ("caffeine jitters"). In my opinion, Organic Japanese Matcha is worth it. It is a GREAT INVESTMENT into YOUR HEALTH for the future. Superior quality costs more. I believe that Organic Japanese Matcha Green Tea is worth it.


10. Are there any cautions?

Our brand of Finest Ceremonial Grade and Premium Grade Organic Japanese Matcha Green Tea are safe healthy teas for almost everybody to enjoy. Matcha green tea contains caffeine. Typical values are 32mg of caffeine per one gram serving of Matcha Green Tea. Matcha Green Tea is low in caffeine relative to standard instant coffee.  If you have caffeine intolerance or sensitivity, consult your doctor before use.  Pregnant, breastfeeding women or children may wish to consult their doctor/physician before use. The Food Standards Agency* recommendation is that "children, or other people sensitive to caffeine, should only consume caffeine in moderation. Pregnant women are advised not to have more than 200mg of caffeine a day". 

*The Food Standards Agency is a Department of the Government of the United Kingdom, which is responsible for protecting public health in relation to food throughout the United Kingdom.    


11. What is the serving size for adults? How do you make matcha? 

  • The serving size for adults is one gram. You can adjust the quantity of matcha to taste (according to personal liking).
  • Click on "How To Make Matcha" in the menu bar above. There are two methods to make matcha tea. There is a quick way to make matcha, which I have called the "Contemporary" method and the Traditional Japanese method.


12. How often should I drink matcha?

  • Once a day, every day. However, you can enjoy drinking matcha more frequently if you wish.








Rachel Beller, MS, RD, is a Top-Ranked Nutritionist in Hollywood, who has a client list to rival any trainer in Hollywood.  She charges celebs $250 per hour. When interviewed, she was sipping Matcha Green Tea. Matcha green tea is not your run-of-the-mill grocery find.  Matcha green tea has the benefits of regular green tea with TEN TIMES THE NUTRIENTS.  Rachel insists that "MATCHA green tea BOOSTS the IMMUNE SYSTEM and HELPS with WEIGHT LOSS."  (from The Black Book of HOLLYWOOD DIET SECRETS)

2.     Matcha Green Tea is a SUPERFOOD...

This is a concentrated form of tea in which ONE CUP OF MATCHA IS EQUIVALENT TO 8 TO 10 CUPS OF GREEN TEA! It boosts your metabolism and also cuts sweet cravings. (from Diet Secrets of the A-List Revealed, Daily Mail, 2008) 

3.     Matcha - The soft drink that's set to be the NEXT BIG THING...

Matcha is "the next big thing, and to consumers hungry for ways of getting healthy without doing anything too radical, it fits the bill." (from the IndependentNovember 2013).














Remember: Take care of your health. The fresher and greener the matcha, the better. Buy Doctor King's® Finest Ceremonial Organic Japanese Matcha Green Tea and take a big step towards a healthier heart and body.