Improve heart health

Tea antioxidants may also benefit heart health if consumed on a regular basis. Several research on habitual tea users has found that they had lower blood pressure and cholesterol levels, as well as a lower risk of heart disease. People who drank more than six cups of tea per day had a "substantially" reduced risk of coronary heart disease than non-tea drinkers, according to a big 2003 research. Several research has also looked specifically at oolong tea. In one research of almost 76,000 Japanese individuals, males who drank 8 ounces (240 mL) or more of oolong tea per day had a 61 percent decreased risk of heart disease.

Furthermore, Chinese researchers found that people who drank 1 to 2 cups of green or oolong tea per day "substantially" reduced their risk of stroke. One thing to keep in mind is that oolong tea includes caffeine, which may modestly increase blood pressure, or hypertension, in certain people. However, studies looking at a relationship between blood pressure and caffeine have yielded inconclusive findings, so further study is required before any firm conclusions can be drawn. Furthermore, because the caffeine concentration in an 8-ounce (240 mL) cup is only around one-fourth that of a cup of coffee, any deleterious effect on hypertension is likely to be minor.