BACKGROUND Muscle soreness and decreased performance often follow a bout of high-intensity exercise. By reducing these effects, an athlete can train more frequently and increase long-term performance. The purpose of this study is to examine whether a high-potency, black tea extract (BTE) alters the delayed onset muscle soreness (DOMS), oxidative stress, inflammation, and cortisol (CORT) respons...

The beverage tea, from the top leaves of the plant Camellia sinensis is one of the most widely used beverages in the world, second only to water. Black and green tea have mostly similar actions. The active components are polyphenols, mainly epigallocatechin gallate in green tea, and the tea leaf polyphenol oxidase mediated oxidation to oolong and black tea, yielding other polyphenols, theaflavi...

Signal transducers and activators of transcription (STATs) play a critical role in signal transduction pathways. STATs are a family of cytoplasmic proteins with roles as signal messengers and transcription factors that participate in normal cellular responses to cytokines and growth factors. Phosphorylation of STAT1 at Ser727 is essential for its activation and occurs in response to stress sign...

duction, and therefore represents one of the most important beverages in the world. Additionally, black tea is rich in polyphenols compared to other beverages, and the various health benefits associated with its consumption, including antioxidative, anticancer and anti-inflammatory activity, have recently been investigated. Black tea is produced by crushing the fresh leaves of Camellia sinensis...

Tea leaves produce organic compounds that may be involved in the defense of the plants against invading pathogens including insects, bacteria, fungi, and viruses. These metabolites include polyphenolic compounds, the six so-called catechins, and the methyl-xanthine alkaloids caffeine, theobromine, and theophylline. Postharvest inactivation of phenol oxidases in green tea leaves prevents oxidati...

BACKGROUND Tea catechin epigallocatechin-3-gallate (EGCG) and other polyphenols, such as theaflavins (TFs), are increasingly proving useful as chemopreventives in a number of human cancers. They can also affect normal cells. The polyphenols in tea are known to have antioxidant properties that can quench free radical species, and pro-oxidant activities that appear to be responsible for the induc...

Black tea is one of the most popular natural beverages, which is consumed by the majority of the world population. Tea consumption has been reported to inhibit to tumor formation in various experimental and epidemiological studies (Katiyar and Mukhtar, 1996). Tea ingredients inhibit N-nitrosomethyl benzylamine, diethylnitrosoamine and polycyclic aromatic hydrocarbon induced esophageal, lung and...

As the population ages, neurodegenerative diseases such as Parkinson's disease (PD) and Alzheimer's disease (AD) impose a heavy burden on society and families. The pathogeneses of PD and AD are complex. There are no radical cures for the diseases, and existing therapeutic agents for PD and AD have diverse side effects. Tea contains many bioactive components such as polyphenols, theanine, caffei...

Black tea extracts (hot aqueous, polyphenols and theaflavins) and green tea extracts (hot aqueous, polyphenols, epicatechin, epicatechin gallate, epigallocatechin and epigallocatechin gallate) were tested in nine standardized cell culture assays for comparative cancer chemopreventive properties. Most black and green tea extracts strongly inhibited neoplastic transformation in mouse mammary orga...