Many sources will tell you that green teas have less than black, but that is not necessarily true. Some varieties have the same amount. The caffeine-content of the green varieties varies from 30mg to 50mg per 8 ounce cup, more or less depending on a variety of factors. Black teas average 47mg per cup. So, the real answer to does green tea have caffeine equal to black varieties is "maybe".
An 8 ounce cup of drip brewed coffee contains 95mg. A 16 ounce Starbucks Cafe Latte contains 150mg and a "Grade" contains 330mg. Sodas have differing amounts depending on the brand. The soda with the highest caffeine content is Mountain Dew, coming in at 54mg per 12 ounces. When your caffeine-intake gets up to 500mg per day, you are likely to start having problems, such as poor sleep, headaches and nervousness.
Brewing at home is one of the big variables. The longer that the leaves are allowed to seep, the higher the caffeine-content becomes. The amount also depends on the country where the leaves were grown. Those grown in India, for example, tend to have more than others. If you are worried about the answer to does green tea have caffeine, use a shorter brewing time.
Most of those bottled beverages don't actually contain much tea. So, does green tea have caffeine when it is bottled? 8 ounces of Sobe regular contains only 14mg per 8 ounces. Of course you have to double that for a 16 ounce bottle. The beverages with the highest caffeine-content are those energy drinks. They claim that the "jolt" comes from green tea, ginseng and other herbs, but the stimulating effect that you get from those drinks is really due to caffeine, not herbs. If you want to really improve your energy level, start taking a good nutritional supplement instead.
The amount that is present in the best dietary supplements is minute, less than one milligram per serving. Numerous health benefits are believed to be associated with the antioxidants found in green and black teas. Antioxidants are good for your health. They protect the cells of your body from free radical damage and perform other functions. They may help you live a longer, disease-free life.
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