If you're wondering if green tea does contain caffeine than the answer is maybe. That is probably not the answer you would like however that is the honest answer because it depends on a lot of different factors. The biggest factor is rather or not the tea is decaffeinated or not. If it is decaffeinated than the answer is that it doesn't contain caffeine technically. However decaffeinated tea still has around 3% of the caffeine that regular tea has. The process is that the tea leaves are rinsed with a solution that removes it until it meets the tea meets the industry standards.Another popular tea that does not contain the ingredient caffeine is herbal tea. The reason is that this type of drink doesn't even come from the same plant as green tea but rather it is created from dried fruits, flowers and spices. How much caffeine green tea contains also is determined by a variety of facts. Black tea usually contains the most of this substance at around 50 mg's a cup. Green tea comes next at around 23 mg's a cup and white tea has the least amount of this ingredient in it at around 18 mg's a cup. Compared to a cup of coffee at around 80 mg's and the number factors in all types of coffee it isn't that bad. If someone is interested in removing even more of the caffeine there is an easy process to do this. Firstly put the tea in hot water for around a minute and then discard the water. Take the tea leaves and put it in a second batch of water and drink this liquid. You will remove some of the benefits of the tea however you will also remove some of the caffeine as well. Believe it or not there is actually some nifty health benefits of this substance. Here is a tip if you feel a headache coming on drink some coffee or tea because it can help ease this problem. It can also help prevent cavities, cancer, Parkinson's disease and gallstones. However there can also be some negative effects of caffeine as well. The biggest one is that if consumed late at night it can prevent someone from getting a good's night rest. Also its effect on the cardiovascular system can be negative as well. The reason for this is it can increase someone's heart rate, and increase someone's blood pressure which can lead to heart problems. It can also increase blood sugar levels which isn't good at times, can cause anxiety, and an increased risk of ulcers (which is a wound in the stomach). Another point I would like to provide is that many people think that this stimulate improves memory, thinking and reaction time. However the opposite is more of the case. Caffeine actually decreases blood to the brain by as much as 30%.The best tip I would give for someone who wants the benefits of tea without the stimulation is to take a supplement. This is what I do and I use the company Xtend-Life. The company has a six month money back guarantee which is fairly good. The prices are really low compared to what u can get. Plus their products are GMP compliance which means it's very high quality. To learn more click on http://www.increasemyhealth.net.