Black tea consumption accounts for 78% of the overall tea beverage industry and therefore has deserved the attention of tea scientists. Below Teasenz has summarized the latest research findings.
Black tea benefits on cardiovascular health
In a study of 95 individuals in 2012, participants logged their beverage intake and completed self-reports of associates of work performance (fatigue/exhaustion, mindfulness, work engagement), subjective work performance, mood, work-related strain and recovery. The result of study indicates that tea consumption was associated with increased work performance and reduced tiredness and the result of study clearly proved that tea intake may have a role in optimizing work related psychological stress and performance.
Reference: Janet Bryana, B.M. (2012). Relationships between tea and other beverage consumption to work performance and mood . Appetite, 339–346.
Impact of black tea drinking on obesity
Different studies investigated potential health benefits of black tea regarding metabolic syndrome. A present study conducted by Vernarelli in 2013 investigated an association between black tea and the existence of a metabolic syndrome in adults. During the study participants were ask to report the frequency of tea consumption by means of questionnaires. The result of study clearly indicated an inversely relation between obesity and the black tea consumption. Black tea consumers had lower mean weight circumference and lower BMI. In conclusion, black tea consumption is associated with lower risk of metabolic syndrome.
Reference: Vernarelli JA, L. J. (2013). Tea consumption is inversely associated with weight status and other markers for metabolic syndrome in US adults. Eur J Nutr, 52(3):1039-48.
Cancer prevention effects of black tea
Black tea polyphenol possess many potent antitumor effects. The analysis of black tea indicated that it contains polyphenol, which are composed of theaflavins, and catechins and these all are responsible for the health benefits of black tea. In a study conducted by Min-Hsiung Pana in 2013 the anti tumor and cancer prevention effect of black tea was evaluated. The study summarized that results from other studies clearly proved the cancer prevention effects of black tea in cases of prostate, overian and rectal cancers. The study also provide information that daily intake of black tea by women are associated with reduced risk of ovarian and bladder cancer.
In a study of 2012 by Mujtaba the effects of polyphenol, thioflavin which are important constituents of black tea on the tumor growth was studied. The results of study clearly indicates that black tea extract enriched in theaflavin have many health benefits regarding tumor proliferation, and black tea extract inhibits the proliferation of human multiple cancer cells in a dose depended manner. The researchers concluded that theaflavin can decrease the tumor cell growth and therefores shows anticancer effects of black tea.
Reference: Min-Hsiung Pana, S. (2013). Black tea in chemo-prevention of cancer and other human diseases . Food Science and Human Wellness.
Reference: Mujtaba T, D. Q. (2012). Black tea polyphenols inhibit tumor proteasome activity. In Vivo, ):197-202.
Black Tea Health Benefits Regarding Diabetes and Coronary Heart Disease
Diabetes and coronary heart disease represents major diseases in recent time and one of the major causes of morbidity. Many clinical studies suggest the health benefits of black tea regarding diabetes and coronary heart disease. The results of many clinical studies show that intake of black tea which contain many active component, can inhibit oxidative damage and improve endothelial function. In a study by (C.H.S Ruxton, 2012) evaluate the association between black tea consumption with the prevalence of cardiovascular and diabetes disease and also consider the mechanism by which black tea protects against these diseases. The findings from different studied clearly suggested that black tea intake (3 cups/day ) reduced risk of coronary heart disease and in case of diabetes(1-4 cup) daily provides beneficial effects.
Reference: C.H.S Ruxton, P. (2012). Is black tea consumption associated with a lower risk of cardiovascular disease and type 2 diabetes? Nutrition Bulletin.
Black tea found to improve work performance
In a study of 95 individuals in 2012, participants logged their beverage intake and completed self-reports of associates of work performance (fatigue/exhaustion, mindfulness, work engagement), subjective work performance, mood, work-related strain and recovery. The result of study indicates that tea consumption was associated with increased work performance and reduced tiredness and the result of study clearly proved that tea intake may have a role in optimizing work related psychological stress and performance.
Reference: Janet Bryana, B.M. (2012). Relationships between tea and other beverage consumption to work performance and mood . Appetite, 339–346.
Antibacterial health benefits of black tea regarding eye allergies
A recent study was performed to evaluate the health benefits of black tea regarding eye (ophthalmic) diseases. During this study conducted by Sazatollah Memarzadeh in 2013, patients suffering from eye allergies were sampled from the eye clinic and from these samples several bacteria were isolated. Afterwards, these different bacterial strains mixed with different amounts of black tea extract. The result of study clearly showed that adding black tea extract to the bacteria sample had a decreasing effect on bacteria growth and the effect became stronger by increasing the dose of black tea.
Reference: Sazatollah Memarzadeh, M.V.K. (2013). The antibacterial effect of camellia sinensis extract on bacterias, conjunctivitis in vitro. JSKUMS.