Studies in leukemia cells revealed similar results, suggesting that black tea may have cancer-protective properties, though more research is needed ( 33). Theaflavins, thearubigins, and catechins are the primary ones in black tea, while coffee is rich in flavonoids and chlorogenic acid (CGA) ( 30, 31).Ī recent test-tube study discovered that theaflavins and thearubigins inhibited the growth of lung and colon cancer cells and ultimately killed them ( 32). Many groups of polyphenols are present in tea and coffee. Coffee contains more caffeine per serving than black tea, but both beverages may provide its associated benefits.Īntioxidants protect your body against free radical damage, which may help prevent the development of certain chronic diseases ( 25).īoth tea and coffee are loaded with antioxidants, primarily polyphenols, which contribute to their characteristic flavor and health-promoting properties ( 26, 27, 28, 29). SummaryĬaffeine is a powerful stimulant that has been associated with protective effects against some chronic diseases. What’s more, moderate caffeine intake has been associated with protective effects against dementia, Alzheimer’s disease, metabolic syndrome, and non-alcoholic fatty liver disease ( 20, 21, 22, 23, 24). Other studies indicate that caffeine may reduce type 2 diabetes risk by improving insulin sensitivity ( 17).Ī review of 9 studies in 193,473 people showed that regularly drinking coffee significantly lowered the risk of type 2 diabetes ( 18, 19). One review of 40 studies determined that caffeine intake improved endurance exercise outcomes by 12%, compared with a placebo ( 13).Īs for caffeine’s effect on mental alertness, research shows that it improves performance in both simple and complex tasks ( 14, 15).Ī study in 48 people who were given a drink containing either 75 or 150 mg of caffeine revealed improvements in reaction times, memory, and information processing, compared with the control group ( 16). Though scientists have primarily focused on coffee when researching the positive effects of caffeine, both drinks - despite containing differing amounts of this substance - can provide its associated health benefits.Ĭaffeine intake may reduce your risk of certain chronic diseases and improve athletic performance, mood, and mental alertness ( 7, 8, 9).Ĭaffeine works as a powerful stimulant for your central nervous system, which is why it’s considered a performance-enhancing substance in sports ( 10, 11, 12). One 8-ounce cup (240 ml) of brewed coffee contains an average of 95 mg of caffeine, compared with 47 mg in the same serving of black tea ( 4, 5, 6). The amount of caffeine considered safe for human consumption is 400 mg per day. While the caffeine content can vary depending on brewing time, serving size, or preparation method, coffee can easily pack twice the caffeine as an equal serving of tea. Present in many common beverages, including coffee and tea, it’s known for both its beneficial and adverse effects on human health. Caffeine is the most studied and consumed stimulant in the world ( 2, 3).
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |