Which type of tea contain more tea polyphenols?

Tea polyphenols have been identified in various foods and beverages. Known as catechins, these compounds are responsible for the health benefits of green tea. They have been shown to inhibit the progression of certain chronic diseases. Therefore, it is essential to know the number of tea polyphenols in your diet. You may even want to include a nutritional supplement in your diet. You can also use a standardized extract to enhance your body’s antioxidant capacity.

In fact, the content of tea polyphenols in the finished tea is mainly affected by fresh leaves and technology. Let’s first take a look at what factors affect the tea polyphenol content in fresh leaves:

  • According to the scheme for the whole tea tree, the highest levels of polyphenols were found in new leaves, followed by old leaves, stems and roots, which had lower levels. From the first leaf, its content decreased with the increase of leaf position.
  • In general, regions exposed to high temperature, high sunlight, or long periods of sunlight increase tea polyphenols content, while vice versa. Therefore, the tea polyphenols content of summer tea is the highest, followed by autumn tea and spring tea. In general, when tea plants exceed a certain altitude (about 500 meters), the content of tea polyphenols decreases with the increase of altitude.
  • Larger-leaf teas typically have higher levels of polyphenols compared to mid-lobular ones, according to a study.
  • According to the composition of different colors of tea, the content of tea polyphenols in purple buds is higher, followed by yellow-green buds, and dark green buds have lower content.
  • The polyphenols content of fresh leaves is just one thing to buy, as they are heavily influenced by the process during production. The polyphenol content of tea generally shows the following pattern: green tea > white tea > yellow tea > black tea > dark tea. Yes, the higher the fermentation, the lower the polyphenols.


The anticarcinogenic potential of tea polyphenols is based on a variety of studies. Some of these studies show that catechins and EGCG induce Phase II enzymes and inhibit heterocyclic amine formation. Other studies suggest that catechins inhibit transcription factors including NF-kB, AP-1, and p53, and inhibit the expression of c-jun mRNA. Epidemiological studies also support the antioxidant properties of tea.

In animal models, tea consumption has been found to inhibit the growth of enterobacteria that produce harmful amines. In animal studies, tea has been found to increase beneficial bacteria. These organisms produce organic acids, which lower the intestinal pH. In vitro studies have shown that polyphenols in green tea inhibit the replication of rotavirus and influenza A virus in monkey and animal cell cultures. Some flavonoids also prevent the propagation of the HIV virus by inhibiting the reverse transcriptase enzyme, which allows infection in host cells.

The bioactivity of tea polyphenols has also been investigated. In addition to biological activities, they are thought to protect against cancer. Research conducted by An, B., Son, J., and Park, C. has revealed that green tea polyphenols are potent antioxidants. A recent study conducted in Japan demonstrated that green and black tea contain similar amounts of catechins. Further studies are needed to confirm these findings.

In humans, tea consumption is associated with decreased incidence of cancer. This protective effect is thought to be due to the presence of polyphenols in green and black tea. There are also studies on the polyphenols’ biological activity. A study has shown the antimicrobial activity of green and black tea.  and conducted antimicrobial tests in rats using pu-erh tea and found antimutagenic and anti-inflammatory effects.

Although research on the health benefits of tea consumption is ongoing, it is important to note that the polyphenol content in tea is not measurable in humans. In fact, a study in mice showed that tea had a greater antioxidant capacity than vegetables. Researchers analyzed the antioxidant capacity of green and black tea, and found that green and black tea had higher antioxidant capacities than brewed and unbrewed. In addition, brewing the tea improves plasma antioxidant capacity within 30 minutes after ingestion.


The total antioxidant capacity of tea is not directly related to the polyphenol content of the tea. However, the number of antioxidants present in tea is influenced by the infusion time and structure of the tea. The teas in this study were significantly higher in polyphenols than the rest of the samples. Moreover, the antioxidant capacity of green and black tea was significantly greater than the others.

A study conducted in rats suggested that tea polyphenols had anti-carcinogenic effects. Its anti-inflammatory effects may also have beneficial effects. In rats, it has been found that drinking tea may reduce the incidence of CHD and stroke in human populations. Furthermore, it can reduce the level of oxidative stress. Its high polyphenol content in humans can prevent a variety of chronic diseases.

The total antioxidant capacity of tea does not depend on the specific polyphenols in the tea. Rather, it is the combined activity of a number of different antioxidants, such as phenolic acid and catechins. A tea’s antioxidant capacity is a measure of how well it protects the body and how many people consume it. In addition, it has a significant impact on the prevention of cardiovascular disease.

Riotto botanical co., ltd. is a professional manufacturer and supplier of plant extract and nutritional ingredients from China and has been in this field for more than 11 years. If you are looking for a reliable tea polyphenols extract powder supplier, you have come to the right place, please contact [email protected] for further discussion.