Drinking Too Much Caffeine? Here’s How To Tell


Caffeine can be found in many foods and drinks we consume and it is a naturally occurring stimulant. Many of us struggle without our morning coffee, but too much caffeine can cause a range of side effects. So how much caffeine should we be having and how do you tell when you've had too much?


Caffeine like must substances has been studied and evaluated to ensure that it is safe for human consumption, that research tell us:

  • It is recommended that adults consume no more than 400mg per day.
  • Pregnant and breastfeeding women are recommended to limit intake to 200mg a day to ensure the safety of the growing foetus and infant.
  • In children and adolescents its intake should be limited due to the potential effects on anxiety and behaviour.


The amount of caffeine in your favourite foods and drinks might surprise you…

  • 100mg in a mug of instant coffee
  • 140mg in a mug of filter coffee
  • 75mg in a mug of tea
  • 40mg in a can of cola
  • 80mg in a 250ml can of energy drink
  • 25mg in a 50g bar of plain dark chocolate
  • 10mg in a 50g bar of plain milk chocolate

{The amount of caffeine in each may vary depending on many different factors. Source: NHS Choices}

To maintain healthy energy levels throughout the day it is important to prioritise sleep and manage your stress levels, as well as consume a healthy and balanced diet. Consuming regular meals can also help to maintain our energy levels, and maintain a steady blood sugar level. Limiting foods that are high in simple sugars such as; sugar sweetened drinks, sweets, cakes etc can help us to maintain steady blood sugar levels throughout the day, and stop us reaching for the caffeine.