By yourNEWS Media Newsroom
NEW YORK — Matcha, a powdered form of green tea traditionally consumed in Japan, is attracting growing interest as an alternative to coffee because of its combination of caffeine, the amino acid L-theanine and naturally occurring antioxidants that may support concentration and overall health. Unlike conventional brewed tea, matcha is prepared by whisking finely ground tea leaves into water, allowing consumers to ingest the entire leaf rather than drinking an infusion from which the leaves have been removed.
An Oct. 26 article in The Epoch Times examined matcha’s nutritional characteristics and its increasing popularity among people seeking an alternative source of caffeine. Registered dietitian Asako Miyashita explained that consuming powdered whole tea leaves can provide greater exposure to certain beneficial plant compounds than conventional green tea, particularly epigallocatechin gallate, or EGCG, a polyphenol studied for its antioxidant and anti-inflammatory properties. However, the concentrations of these compounds differ considerably among products, making the quality of the tea and its preparation important factors.
Matcha originates from the same plant as traditional green and black teas, Camellia sinensis, but its cultivation and processing distinguish it from other varieties. Tea plants used for matcha are typically shaded before harvesting, a practice that influences the composition of their leaves, including concentrations of chlorophyll and certain amino acids. After harvesting, the leaves are processed, dried and ground into a fine powder. Because the powder is consumed directly, matcha delivers compounds that might otherwise remain in discarded tea leaves, including some dietary fiber and other plant constituents.
One of matcha’s most notable characteristics is its combination of caffeine and L-theanine, which may influence alertness differently than caffeine consumed alone. Caffeine stimulates the central nervous system and can temporarily improve wakefulness, attention and reaction time, while L-theanine has been investigated for its potential effects on relaxation, stress responses and cognitive performance. Researchers have examined whether the two compounds work together to support concentration without producing the same degree of nervousness that some people experience after drinking coffee.
A 2025 systematic review and meta-analysis published in Nutrition Reviews evaluated randomized controlled trials involving tea, L-theanine and combinations of L-theanine and caffeine. The findings suggested that the combination may provide modest improvements in certain measures of attention and cognitive performance. However, the effects varied across studies, and the available evidence does not establish that matcha consistently provides a smoother or longer-lasting energy boost than coffee.
Matcha’s caffeine content is also variable. A 2026 scientific review published in Frontiers in Nutrition reported that commercially available matcha products contained approximately 35 to 70 milligrams of caffeine per two-gram serving, depending on their composition. The same serving size provided an estimated 73 to 139 milligrams of EGCG. Those differences mean that two drinks prepared with similar amounts of matcha powder can have noticeably different concentrations of caffeine and antioxidants.
For comparison, an eight-ounce cup of brewed coffee commonly contains approximately 95 milligrams of caffeine, although serving size, bean variety and brewing methods can produce substantial differences. Matcha beverages made with larger quantities of powder may approach or exceed the caffeine content of some coffee preparations. Consumers who are sensitive to stimulants may therefore experience restlessness, anxiety, palpitations or sleep disturbances after consuming matcha, despite its reputation as a gentler alternative.
Scientists are also investigating matcha’s potential influence on stress and mental performance. A 2018 study published in Nutrients examined the relationship between matcha’s chemical composition and stress-related responses. Researchers found that certain preparations containing favorable proportions of L-theanine and other compounds were associated with lower anxiety responses in a small human trial involving 39 participants. The results suggested that matcha’s effects may depend not simply on the amount of caffeine or L-theanine present, but on the balance among several naturally occurring constituents.
More recent research has reinforced the importance of these differences. The 2026 Frontiers in Nutrition review concluded that evidence concerning matcha’s effects on cortisol and other hormonal markers remains limited, partly because studies use different preparations and frequently examine isolated ingredients rather than whole matcha. The researchers emphasized that findings involving concentrated extracts or individual compounds cannot automatically be applied to ordinary servings of matcha tea.
EGCG has attracted particular scientific interest because laboratory and animal studies have identified antioxidant and anti-inflammatory activity associated with the compound. Those properties have encouraged research into possible cardiovascular, metabolic and neurological benefits. Nevertheless, the presence of EGCG in a beverage does not establish that drinking matcha prevents heart disease, cognitive decline or other medical conditions. Human research remains insufficient to support many of the broader health claims associated with concentrated green tea products.
Researchers also distinguish between matcha consumed as a beverage and high-dose green tea extract supplements. Ordinary dietary consumption generally involves substantially lower concentrations of catechins than concentrated supplements, some of which have been associated with liver injury. The differences are important when evaluating safety information and claims about the potential benefits of green tea antioxidants.
Preparation can further influence the nutritional characteristics of matcha. Traditional matcha is whisked into water, while commercially prepared beverages frequently contain milk, sweeteners, syrups or flavored additives. These ingredients can change the beverage’s calorie and sugar content without necessarily improving its nutritional value. The amount of matcha powder used, the quality of the product and the presence of additional ingredients can therefore make substantial differences between beverages sold under the same name.
A 2026 review published in Nutrients also examined research involving matcha and sleep quality, noting that some studies found improvements in subjective sleep measurements while others reported little change in objective measures. The findings suggest that matcha’s effects on sleep and mental performance may depend on caffeine sensitivity, timing of consumption and the composition of the tea itself.
For people considering matcha as a replacement for coffee, the principal distinction is not that one beverage is universally healthier than the other, but that matcha delivers caffeine alongside L-theanine and other compounds in a different nutritional combination. Its whole-leaf preparation can increase exposure to certain green tea constituents, while its caffeine content remains sufficient to produce stimulant-related effects in sensitive individuals.
Current research supports continued investigation into matcha’s influence on attention, stress and cardiovascular health, but larger, well-controlled human studies are needed to determine the extent of its benefits. As interest in matcha continues to grow, researchers emphasize that its potential advantages should be evaluated alongside serving size, preparation methods and the limitations of existing scientific evidence.
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