Caffeine content in white, green and oolong tea With black tea coming in around half the caffeine as coffee (45 per cup versus 90 for coffee) you can enjoy a lot more tea throughout the day. Caffeine recommended daily limits.ĭaily recommended caffeine should be about 400 milligrams, which is 4 "cups" of coffee, but cups being 8 ounces, it really means 2 large cups to a lot of people. EGCG, L-theanine are found in tea in varying amounts - and these too can increase concentration and awareness without giving you a caffeine buzz. And don't forget, there are other components in tea that affect how caffeine is processed within your body. Will there be enough variation between one type of black tea versus another to make a noticeable difference? Probably not that you will notice. Another trick to alter the caffeine content in tea, as well as coffee is to simply adjust the serving size.Īt the end of the day - drinking black tea will yield the highest caffeine as a rule of thumb, with green and white teas having lower amounts. There are literally dozens of factors that make up the caffeine content in tea, and any tea company can seize one aspect and declare that this is the highest caffeine tea you can buy, when it might be taking data from a particular moment in time that is 'ideal' but changes later when it is being processed. Caffeine content in tea - does black tea always have the most?īecause there are a myriad of ways caffeine is measured and when its measured - its hard to say which tea variety has the absolute highest and lowest amount of caffeine. Some shade grown green teas like Gyokuro tend to have higher caffeine levels than their non-shaded cousins. Older bushes, typically found in certain areas of China also result in lower caffeine levels. Lapsang Souchong is made from lower, older tea leaves, and thus it is among the lowest in terms of caffeine content. The Chinese "camelia" variety of tea leaves tend to be lower in caffeine. Assam is a classic example of this tea variety. These are teas grown in India, Africa and Sri Lanka. There are other influences that can alter the caffeine content in tea, including which part of the plant the leaf comes from, altitude and local conditions, leaf grade, type of tea, fertilizer used, and much more.Īs a general rule, the Assamica tea variety is higher in caffeine than other varieties. Because black tea is oxidized, it allows more caffeine to be extracted from the leaf versus other types of tea. One of the reasons for this is a longer infusion time versus green along with higher steeping temperatures, typically boiling. Black tea typically has the most caffeine of all the tea types.
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