By Gabe Sanders PhD, NSCA-CSCS
Caffeinated green tea contains catechins and polyphenols. Catechins are thought to improve your metabolism by increasing thermogenesis or in other words, they help you burn more calories by increasing your body heat.
Green teas contain polyphenols that have antioxidant properties, which can improve your overall heart health. Together, these ingredients are thought to help improve your metabolism, cholesterol and even lower your blood pressure. Catechins and polyphenols are two ingredients that are also found in decaffeinated green tea and may be able to have the same effect without the caffeine.
Drinking decaffeinated green tea might be better for you
Drinking/ ingesting decaffeinated green tea can be advantageous for many people, especially those with high blood pressure and other vascular diseases. The lack of caffeine in decaffeinated green tea will prevent your blood vessels from contracting, while the catechins and polyphenols can still work to improve your metabolism and heart health.
A recent study found that exercise and ingesting a decaffeinated green tea pill (equivalent to six- seven cups of green tea) for four weeks can improve your fat metabolism by as much as 25%, reduce your body fat by 1.6%, and also improve your exercise performance by nearly 11%.
The upside to these findings is simple, decaffeinated green tea might be better for you if you need to avoid vascular constriction. Sure caffeine is a great stimulant and helps you stay awake, but for those of you looking for a safe and effective supplement to boost your metabolism and your exercise performance, try decaffeinated green tea!
Roberts JD, Roberts MG, Tarpey MD, Weekes JC, Thomas CH. The effect of a decaffeinated green tea extract formula on fat oxidation, body composition and exercise performance. Journal of the International Society of Sports Nutrition 2015, 12:1.