Efficacy of green tea: It has pharmacological effects of refreshing brain, clearing away heat and relieving summer-heat, promoting digestion and resolving phlegm, relieving fatigue and losing weight, clearing away heart-fire, detoxicating and sobering up, promoting fluid production to quench thirst, reducing fire and improving eyesight, stopping dysentery and removing dampness. It also has certain pharmacological effects on modern diseases, such as radiation complicated with cardiovascular and cerebrovascular diseases and cancer.

Efficacy of black tea: Black tea can help digestion, stimulate appetite, induce diuresis, eliminate edema and strengthen heart function. Flavonoids rich in black tea can scavenge free radicals, have anti-acidification effect and reduce the incidence of myocardial infarction. Chinese medicine believes that tea is also divided into cold and heat. Green tea, for example, tastes bitter and cold, and is suitable for drinking in summer to cool off the heat. Black tea and Pu 'er tea are warm and suitable for drinking in winter. As for oolong tea and Tieguanyin, they are more neutral.

For the weight loss effect of green tea and black tea, black tea is obviously better than green tea, especially drinking black tea is suitable for drinking before exercise and during the day, because the coffee in black tea can quickly promote the decomposition of fat, and the effect is also obvious.

Extended data:

Antioxidants contained in green tea help to fight aging. Because in the process of human metabolism, if it is over-oxidized, it will produce a lot of free radicals, which are easy to age and cause cell damage. SOD (Superoxide Dismutase) is a kind of free radical scavenger, which can effectively remove excess free radicals and prevent the harm of free radicals to human body. Catechins in green tea can significantly improve SOD activity and scavenge free radicals.

Caffeine in black tea stimulates the nerve center by stimulating the cerebral cortex, which promotes the refreshing and concentration of thinking, thus making the thinking reaction more acute and enhancing memory; It also has an exciting effect on the vascular system and the heart, strengthens the heartbeat, thus accelerating blood circulation to facilitate metabolism, and at the same time promoting sweating and diuresis, so as to accelerate the excretion of old and waste substances such as lactic acid (a substance that makes muscles feel tired) in the body and achieve the effect of eliminating fatigue.

References:

Can you lose weight by drinking tea? Is it better to drink black tea or green tea?-People's Network