Theine, the caffeine in tea

In reality, theine is caffeine, and contrary to what one might think, caffeine has no color. A tea with a darker liquor does not necessarily contain more caffeine than a lighter tea. 

The concentration of caffeine may depend on the seasons and the the temperature of the water for the infusion. Indeed, caffeine being extremely soluble in hot water, if you decide to brew your tea cold, you will have very little theine.

That being said, although caffeine is debated, this does not mean that you should drink your tea cold. On the contrary! A cup of tea of about 200 ml contains 40 to 70 mg of caffeine, while the safe dose of caffeine is about 40 mg per kilogram per day. In other words, a healthy person who weighs 60 kg can safely ingest up to 2400 mg of caffeine, or about 50 cups of tea. 

Moreover, the caffeine in tea acts in synergy with catechins and theanine, thus relaxing the vascular smooth muscle, promoting blood circulation and reducing the risk of liver disease and heart disease. Finally, a little bonus: caffeine has a diuretic effect. 

Of course, like any food or ingredient that can be beneficial to us, tea should be consumed in moderation, so that its benefits do not become harmful when consumed beyond what is recommended, such as salt or sugar for example.

So no more talk. If you're healthy, you don't have to worry. You can continue to drink your tea or coffee as you normally do, within reason. 

Health, 

Sabreen