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C. Green Tea and Heart Related Disease
There is evidence that daily drinking of green tea has been linked to a lower risk of death from heart problems. In a 2015 review of observational studies, an increase of just one cup of green tea each day may have produced a 5% less death rate related to cardiovascular issues.
Some researchers have noted that green tea may be associated with a reduced stroke risk.
A 2013 review of randomized controlled medical testing concluded that green tea used over a 3–6 months seems to lower the systolic and diastolic blood pressures a little. Later analyses of the effects of long-term green tea use as related to blood pressure have reached similar conclusions.
D. Green Tea and Blood Sugar
When looking fasting blood sugar, researchers found that green tea lowers the fasting blood sugar but in clinical studies the drink’s effect on hemoglobin A1c and fasting insulin levels was more inconsistent than conclusive.
E. Green Tea and Choesterol
Imbibing green tea, as well as taking green tea supplements, decreases the blood’s level of total cholesterol, somewhere around 7 mg/dL, LDL cholesterol went down about 2 mg/dL, while at the same time it does not affect the concentration of HDL cholesterol. A 2013 review performed an analysis of longer-term, over three months, randomized controlled trials regarding green tea and cholesterol. The researchers concluded that green tea had lowered cholesterol concentrations in the blood.
