Immediately after picking the leaves for Oolong teas are withered in direct sunlight. Withering the leaves reduces moisture and makes the leaves more pliable. Try to select tea bags or loose tea leaves which are not chemically treated. How you prepare the tea can also have an effect: many health experts believe boiling water destroys the flavonoids in green tea which give it its healing potency.Green tea may cause a severe increase in blood pressure (called a "hypertensive crisis") when taken together with MAOIs, which are used to treat depression. Examples of MAOIs include phenelzine and tranylcypromine.Green tea helps our cellular engines (mitochondria) to better metabolize calories more efficiently, providing a significant weight management tool.While this analysis did not specify LDL particle size, previous research studies have demonstrated that green tea consumption results in larger, less atherogenic particles that do not raise disease risk.Green tea contains between 30 and 40 percent polyphenols that contribute to its myriad of health benefits. Common black tea contains between 3 and 10 percent polyphenols, as the leaves have been highly refined to remove the naturally occurring compounds.It has also been shown to promote brain health because the active compound, EGCG (Epigallocatechin gallate) freely crosses the blood-brain barrier to provide antioxidant support and lower damaging levels of brain inflammation. Researchers from Japan reporting in the American Journal of Clinical Nutrition demonstrate that regular green tea consumption lowers the risk of developing functional disabilities that lead to problems with daily chores and activities, such as bathing or dressing.