Photo: PixabayA study reveals big differences in the amount of caffeine coffee-drinkers get from different high street chains.
According to Which? a medium cappucino from Costa contains 325 milligrams - five times stronger than the same drink at Starbucks.
The variations are partly down to the variety of beans used.
The consumer group says "most people can safely consume 300-400mg a day, but having more than 600mg a day has been linked to insomnia, nervousness, irritability, increased blood pressure and upset stomachs. "
Which? also includes Greggs in the study, which we don't have in Ireland, in their study.
High street coffee caffeine content compared
| Single-shot espresso | Cappuccino | Filter/brewed Coffee | |
| Caffè Nero | 45mg (30ml) | 110-115mg (355ml) | n/a |
| Costa (Signature blend) | 100mg (30ml) | 325mg (362ml) | n/a |
| Greggs | 75mg (28ml) | 197mg (341ml) | 225mg (341ml) |
| Pret | 180mg (30ml) | 180mg (350ml) | 271mg (350ml) |
| Starbucks | 33mg (25ml) | 66mg (350ml) | 102mg (350ml) |
