Black tea is fully fermented tea. Black tea contents lower polyphenol and higher caffeine than green tea. Green tea has the highest polyphenol content while black tea has roughly 2 - 3 times the caffeine content of green tea.
Plain black tea without sweeteners or additives contains negligible quantities of calories, protein, sodium, and fat. Some flavored tea with different herbs added may have less than 1 gram of carbohydrates. All teas from the camellia tea plant are rich in polyphenols, which are a type of antioxidant.
Note:
Drinking a moderate amount of black tea (one to four cups a day) may boost blood pressure slightly, but the effect does not last long. And drinking this amount of black tea is not associated with long-term high blood pressure.
