In daily life, our minds are always active, constantly switching from one task to another. Therefore, living in the present will help our minds stop to focus more on work, reduce stress, anxiety, and enjoy the moments of life.

Sleep deprivation is associated with an increased risk of various chronic diseases such as depression, obesity, cardiovascular disease, diabetes, and leads to reduced quality of life and negative socioeconomic consequences. Substances that can induce sleep, such as drugs and herbs, can often lead to dependence and other side effects. Meanwhile, L-theanine (γ-glutamylethylamide), a natural amino acid found abundantly in tea leaves, has anxiolytic effects through the generation of α brain waves without the addiction and other side effects associated with conventional sleep induction.

Surely everyone has wished they could increase their ability to concentrate when they have to overcome a difficult task at work, review for an important exam or spend time on a difficult project. Therefore, "how to increase the ability to concentrate?" is a question that everyone wants to have an answer.