In one cup of green tea, there are about 112 mg of EGCG, 51 mg of EGC and 15 mg of EC. EGCG (epigallocatechin gallate) is considered to have the most antioxidant activity. Because true teas are made from the same leaves, they all contain catechins. However, the preparation methods of green tea, white tea, and black tea are different and can alter the amount of each catechin. White tea has the most antioxidants, while black tea has the least.
On the other hand, coffee has compounds known as chlorogenic acids (CGA). Green coffee beans are unroasted or raw coffee beans and contain the most CGAs. Green coffee is gaining popularity both as a supplement and as a beverage. While it contains less CGAs, brewed black coffee still has similar health benefits. Instant black coffee contains about 36 mg of CGA while brewed coffee may contain more than 130 mg of CGA. In addition, black tea also contains some CGAs.
Verdict: while there are no studies that state whether catechins or CGA are superior as an antioxidant, tea is the winner because it contains both catechins and CGAs.
#3: Disease prevention
Last but not least on this list of health benefits of coffee vs tea is disease prevention. As previously mentioned, both coffee and tea contain caffeine and antioxidants. Because of their antioxidant properties and other compounds, tea and coffee may prevent certain cancers, diabetes, and cardiovascular diseases.
In studies, catechins and CGAs displayed benefits for weight loss, insulin sensitization, and improving lipid profiles. In a study, CGAs increased homocysteine levels in the blood which may be an indicator for cardiovascular disease. Generally, the drinks with the lowest caffeine-to-antioxidant ratio are the most beneficial.