Matcha is made using finely ground green tea, an ingredient best known for providing calm, focused energy. However, the drink also contains compounds that may help manage blood sugar. Although the research is limited and mostly based on green tea extracts and animal studies, here are three reasons why matcha might have a blood sugar-lowering effect:
One of matcha’s most talked-about compounds is a group of plant chemicals and antioxidants called catechins, with epigallocatechin gallate (EGCG) being the best known. These compounds may help insulin work better, making it easier for sugar to move from the bloodstream into cells where it can be used for energy.
In research involving people with type 2 diabetes, green tea compounds helped cells respond better to insulin compared with no green tea intake. The compounds also helped lower fasting blood sugar levels and improve long-term blood sugar control. Other research that combined results from more than 50 clinical trials found similar improvements in fasting blood sugar and long-term blood sugar control in people who consumed green tea extracts.
Because matcha is made from powdered whole tea leaves, you consume the entire leaf rather than discarding it after brewing. This may provide higher amounts of EGCG and other nutrients per serving than a typical cup of green tea. Still, most studies have tested green tea extracts, not matcha itself, so it’s not clear whether matcha has the same effects.
When you eat carbohydrates, your body breaks them down into simple carbohydrates during digestion. This process happens with the help of enzymes that turn starches and complex carbs into simple carbohydrates, which then enter the bloodstream.
Research suggests that EGCG may slow this process. By partially slowing how quickly carbs are broken down, sugar may enter the bloodstream more gradually after meals. This can help limit sharp blood sugar spikes, especially after eating carb-rich foods.
Most of these findings come from lab studies or research using green tea extracts. Whether drinking matcha has the same enzyme-slowing effect hasn’t been well studied in people.
The cells in the body may not respond to insulin well when there’s ongoing inflammation. This can make blood sugar harder to manage over time.
The catechins in matcha are also known for their anti-inflammatory properties. These compounds may support a healthier gut by encouraging “good” bacteria and strengthening the gut’s protective lining, which may reduce inflammation. In an animal study, matcha reduced inflammation in the liver and improved blood sugar in mice fed a high-fat diet.
The results in humans are limited. One year-long study on green tea extract supplements found that the products didn’t significantly lower inflammation markers in postmenopausal women with overweight or obesity.
More research is needed to know whether matcha meaningfully reduces inflammation or improves blood sugar control in people.
Matcha is generally safe for most healthy adults when consumed in moderate amounts, but it’s not a good fit for everyone. You may want to avoid matcha or talk with a healthcare provider before using it regularly if you:
- Are sensitive to caffeine: Matcha contains more caffeine than standard steeped green tea—though less than brewed coffee—and some people find it worsens anxiety, sleep problems, or heart palpitations. If caffeine tends to affect you, matcha may not be the best choice, or you may want to limit intake. People who are pregnant or breastfeeding should also be mindful of caffeine intake and talk with a healthcare provider before drinking matcha regularly.
- Have low iron levels: Compounds in green tea can affect how the body absorbs iron, especially when consumed with meals. If you have iron-deficiency anemia, check with your healthcare provider first, and consider drinking matcha between meals rather than with food.
- Take certain medications: Green tea can interact with blood thinners, stimulant medications, and certain blood pressure drugs. If you take prescription medications, ask your healthcare provider before having matcha.
- Have a liver condition: Very high doses of green tea extracts have been linked to liver issues. If you have a liver condition, talk with your healthcare provider before adding matcha to your routine.
Using small amounts of matcha is usually enough to get its flavor and potential benefits. Starting with a small serving also allows you to see how your body responds, especially if you’re sensitive to caffeine. Common ways to use matcha include:
- Stir about 1 teaspoon of matcha powder into 1 cup of hot water for a traditional cup of matcha tea, or pour it over ice for a quick iced version.
- Add matcha to unsweetened milk or plant-based milk for a latte.
- Blend a small amount into a smoothie with protein, fiber, and healthy fats to help limit blood sugar spikes.
Before adding matcha to your routine, check with a healthcare provider if you have low iron levels, take prescription medications, or have a liver condition.
When you’re ready to choose a product, look for matcha labeled “ceremonial grade” for drinking or “culinary grade” for cooking. Brands that list the tea’s origin (often Japan) and use airtight, light‑blocking packaging tend to offer fresher, higher‑quality powder. A bright, vibrant green color is another indicator of a high-quality product.
