The campaign group Action on Sugar is demanding a ban on freakshakes and all milkshakes with more than 300 calories.
It surveyed milkshakes sold in restaurants and fast food shops in the UK and found they contained “grotesque levels of sugar and calories”.
BBC explains that the freakshakes are milkshakes that also contain chocolates, sweets, cake, cream and sauce.
The British Heart Foundation calculates an average 25-year-old would need to jog for nearly three hours or vacuum the house for five hours to burn off the calories.
The researchers found that many other shakes contain more than half the daily recommended amount of calories for an adult.