My question is: how much mg of caffeine (as found for example in Nescafe) consumed per day is still considered safe for health?

When taken in excessive amounts what can be the harmful effects?

Are there any harmful effects of sleep deprivation which is a likely result when caffeine is taken in large doses?

Is there any chance of developing any tolerance so that as days of use increase more caffeine is required to get the desired effect?

  • 1
    The title of your question is on topic here, but the entire rest of your question is off topic because it's about you. It's a request for personal medical advice. Can you edit it to ask only the question asked in the title? – Carey Gregory Aug 25 '18 at 4:40
  • 2
    @CareyGregory done editing the question – Sonevol Aug 25 '18 at 5:22
  • 1
    Retracted close vote, thank you. – DoctorWhom Aug 26 '18 at 18:06

I have found an article published in November 2017 that states:

"Evidence supported consumption of ≤400 mg/day in adults is not associated with overt, adverse effects."

Link to the article: https://www.sciencedirect.com/science/article/pii/S0278691517301709

You can see the meaning of 400 mg of caffeine at this webpage:


What makes 400 mg of caffeine?

  1. 5 shots (2-oz) of espresso
  2. 4.7 cups (8-oz) of drip coffee
  3. 5 cans (250 ml) of energy drinks
  • Good answer but doesn't address all my questions – Sonevol Aug 26 '18 at 6:04

Your Answer

By clicking "Post Your Answer", you acknowledge that you have read our updated terms of service, privacy policy and cookie policy, and that your continued use of the website is subject to these policies.

Not the answer you're looking for? Browse other questions tagged or ask your own question.