Here is the information regarding the two main beverages tea and coffee. From many years there is a confusing discussion regarding having these beverages, are they good for us or will they harm us etc.
To answer this question: There is no mandatory rule that we have to have these beverages. We can lead a healthy life without having these beverages. In last 70-80 years these coffee and tea after the have become the commercial crop, the companies which manufacture coffee or tea have influenced a mental conclusion to the public through electronic or printed media. That having tea and coffee is necessary for human beings. They are not only marketing their products but they are not getting in to the human conscious that having coffee or tea is a must for a person.
So does having coffee or tea is harmful for us? The answer will be no it's neither harmful for us. They both are one among the diverse products that are available in our nature. But the funny part is we are using coffee seeds and we are using tea leaves, but the chemical component present in both coffee seeds and tea leaves are the same. That is the speciality of nature.
Although there is no resemblance between the coffee seeds for the tea leaves but both contain a common chemical component called caffeine. Caffeine is basically an alkaloid, alkali destruction when we say alkaloid people will think of nicotine present in the cigarette, if we go further the morphine which are the Opioids, this all belong to the same family. The Theobromine in chocolate, all this come under alkaloid family. The importance of these chemical components (alkaloids) have the influence of encouraging or indefinite to our nerves.
So if we are having coffee or tea daily means we are influenced to the so called fragrance or taste of these two beverages which contains alkaloids like caffeine. But we can survive without these beverages. But there are some good ingredients like polyphenols and tanins which are supposed to be very good for health beyond that the caffeine content in 100 gm of tea is a bit higher compared to 100 gm coffee. Mainly we have to understand that when we drink tea or coffee for the first 15 minutes we will be boosted with a glucose metabolism which will be encouraging for our nerves this is actually the primary action which provides nice emotion to our nervous (neurons) system. But after 15-20 minutes in the secondary reaction the increased neurons start getting down and they will be indefinite which is basically the weakness in nerves. In the tertiary action which is the third step this weekend neurons gets into a stage where it can't gain back its energy and there will be the salt of permanent nervous weakness.
So if we get into the conclusion, the summary of the primary, secondary and tertiary actions there will be bad impression of caffeine on your neurons. On the other part it influences the neurons that it needs the caffeine again and again which becomes a habit and the never ending habit for us.