Research shows that drinking 4 cups of black tea a day can help you recover quickly after stress

2026/09/17 07:25

Nutritionist Curtis pointed out that the study found that subjects drinking a specific drink every day may help improve the impact of stress on the body, and also allow the body to return to normal faster after stress; diagram (picture taken from freepik)

[Health Channel/Comprehensive Report] Modern people’s lives are stressful, and being in a state of chronic stress for a long time may not only make people prone to obesity, but also increase the risk of cardiovascular disease and mental illness. Nutritionist Curtis pointed out that the study found that subjects drinking 4 cups of black tea a day may help improve the impact of stress on the body, but it does not mean that people do not respond to stress, but that it allows the body to return to normal faster after stress. However, he also reminded that people who are prone to having trouble sleeping due to caffeine should be aware that drinking tea too late may affect their sleep.

4 cups a day cortisol drops faster after stress

Curtis posted on the Facebook fan page "Nutritionist Curtis - Helping You Build a Healthy Body" that in a 6-week study, subjects were asked to drink about 4 cups of 250cc black tea per day, or the same amount of flavored drinks with no effect. Six weeks later, the researchers asked the subjects to undergo stress tests such as impromptu speaking and drawing tasks, and analyzed changes in the stress hormone cortisol in saliva, subjective feelings, and platelet activation in the blood before and after stress.

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Drinking black tea helps us recover from stress faster

The results of the study found that whether the subjects drank black tea or not, their blood pressure and heart rate increased to a considerable extent when faced with stress, indicating that the stress feelings were similar. The difference is that after the stress test, the cortisol in the saliva of the subjects who drank black tea dropped faster and to a lower level. And after the task, the subjects who drank black tea had a higher subjective sense of relaxation. Curtis explained that sometimes the stressful task is over, but the mood may not calm down for a long time, which is like an overtime for the body. Drinking black tea can make the stress response get off work on time.

Drinking black tea reduces the cardiovascular damage caused by stress

Curtis further pointed out that platelet activation is a key step in blood coagulation and plays an important role in the development of atherosclerosis. Acute psychological stress can induce sympathetic nerve excitement, thereby stimulating platelet activation. Drinking black tea can reduce platelet activation indicators, including: total leukocytes-platelet aggregates, monocytes-platelet aggregates, neutrophils-platelet aggregates, which means it can reduce the impact of stress on cardiovascular health, including reducing inflammation and thrombosis.

The mechanism behind black tea helping the body relax

Why does black tea relax the body? Curtis explained that tea polyphenols/flavonoids may exert a sedative effect by binding to GABA receptors in the central nervous system; Theanine can inhibit excitatory nerve conduction. Both of them jointly promote the regulation and relaxation of the neuroendocrine system after stress.

Curtis added that if you want to apply the research results in your daily life, it is recommended to consider black tea as a healthy drink choice and drink it appropriately every day. He also reminds people who are prone to poor sleep due to caffeine to be aware that drinking tea too late may affect their sleep.