NHS GP says when drinking too much tea and coffee can become 'toxic'

Some people might rely on these drinks to get through the day, but they can become dangerous

People who rely on drinking tea, coffee and other energy-boosting drinks that contain caffeine should be aware of when the next cup could send them over into a toxic state. Most people believe that a few cups do little harm, but they can cause issues with your heart, cognitive function, and more.

The UK caffeine limit is up to 400mg per day for most healthy adults , based on advice from the European Food Safety Authority (EFSA) . This is about four or five cups of tea or coffee. As Dr Tim Mercer pointed out, pregnant women should have no more than half of this amount (meaning 200mg per day).

Dr Mercer said: "A regular cup of coffee at home, an instant coffee, might be around about 100mg. Y