Black Tea

Black tea is a popular beverage that may possess health benefits. While more research is necessary, it may protect the heart, lower cancer risk, and reduce the risk of diabetes.

After harvesting, black tea leaves go through a process of wilting, bruising, rolling, and oxidationTrusted Source.

Oxidation occurs when the leaves remain exposed to the air for a long time. Enzymes break down the chemicals in the leaves, producing their brown coloring and familiar smell.

The process for making green tea is similar, but it does not involve oxidation. Oxidation may give black tea nutritional benefits that are not present in green tea.

For example, the nutrients in black tea may reduce the risk of several cancers, protect the heart against atherosclerosis, and help maintain healthy blood pressure.