The power of harmony from green tea and caffeine
Green tea extract contains catechin, a powerful antioxidant compound, especially EGCG, while caffeine is famous for its ability to stimulate the nervous system, helping people stay alert. When combined, these two components create a remarkable synergy effect: increasing concentration, supporting energy metabolism and even helping control weight.
According to Dr. Carrie Ruxton, a nutritionist at the British Nutrition Foundation: The combination of caffeine and catechin in green tea helps improve concentration while stimulating more efficient calorie burning.
Caffeine increases metabolic rate, while catechin supports fat oxidation, thereby contributing to weight loss if accompanied by a scientific diet. In addition, the presence of L theanine in green tea also helps reduce stress, creating a feeling of comfortable concentration instead of restlessness like when drinking heavy coffee.
The downside of combining and recommending experts
Despite its many benefits, green tea combined with caffeine is not suitable for everyone. Consuming more than 400 mg of caffeine per day can lead to rapid heartbeat, high blood pressure, anxiety, insomnia or digestive disorders. Some rare cases of liver toxicity were recorded when taking high doses of green tea extract.
Professor David C. Nieman, Director of the Center for Human Health Research at Appalachian State University (USA), warned: Supplements cannot replace a healthy lifestyle. People with heart disease, high blood pressure or sleep disorders need to consider carefully before using".
In particular, pregnant women, breastfeeding women and people who are sensitive to caffeine should limit it to the maximum or only use it when prescribed by medical regulations.
In addition, in the US, the Food and Drug Administration (FDA) has not closely monitored functional foods such as prescription drugs. Therefore, experts recommend that consumers choose products with independent certification from reputable organizations to ensure safety.
Green tea and caffeine extract can bring health benefits if taken in the right dosage and to the right person. However, overusing or using it uncontrollably will bring more risks than benefits. The long-term solution is to eat a balanced diet, exercise regularly and get enough sleep to maintain natural energy.
