Popular morning drink can cause muscle cramps and blurred vision – it's not what you think
![Popular morning drink can cause muscle cramps and blurred vision – it's not what you think](https://i2-prod.dailystar.co.uk/incoming/article31781200.ece/ALTERNATES/s615/0_Woman-at-home.jpg)
A popular daytime beverage can cause signs of 'intoxication' if enjoyed too frequently – and while many of us know too much coffee or booze can be bad for us, few people know about the dangers of this drink