Tea and Caffeine Content

By: Michael Lam, MD, MPH

Green Tea contains a moderate amount of caffeine unless it is decaffeinated. An average cup (6 oz.) of green tea contains about 30 milligrams of caffeine. This compares to a cup of black tea which has about 40 milligrams and a cup of brewed coffee which has 100 milligrams. Caffeine content is also affected by the length of the infusion in water. Black tea infused for 5 minutes yields 40-100 milligrams, whereas a 3-minute

Herbal tea such as chamomile tea is really not tea in the traditional sense and has no caffeine in it.

The best anti-aging liquid to drink is filtered water. Moderate tea consumption if you are in good health and have no caffeine sensitivity or diseases such as cardiac arrhythmias that can be triggered by caffeine, tea consumption is acceptable.


  • Anolious Petratoli says:

    I alternate tea and coffee in my mornings , but in the afternoon the tea simply does not work for me ?

  • Audrey says:

    I’m at the point where I need caffeine to make it through the day. I’ve tried stopping in the past, but the withdrawal symptoms are so bad that I can’t handle them and find myself back again to caffeine. What suggestions do you have for those who want to limit and eventually stop caffeine intake, but is having a hard time doing so?

    • Newsletter says:

      you should not quit until your body has an alternative to dip into for energy which caffeine gives you. This means supporting the adrenal glands first and foremost. My article called Adrenal Fatigue syndrome will outline many tips that you can try first. After your adrenals are strong (which may take some months ), you slowly titrate down caffeine over months and you will feel steady and no crash. So it is a process that can take some time to do. If you want a quick fix, take some vitamin C as you reduce your caffeine slowly can be helpful. Also you need to eat some healthy snacks, like nuts, each time you have a caffeine craving , can help.

      Dr Lam.