Artificial sweeteners are found in a plethora of products from cough syrups to salad dressings, but new research claims that the sugar alternative could actually lead to weight gain.

The chances of developing diabetes, high blood pressure, heart disease and obesity are linked to consuming artificial sweeteners, according to the new large-scale study on the effects of the sugar substitute.

The research was conducted by scientists from the University of Manitoba, Canada and reviewed data from 37 studies which analysed more than 400,000 people for an average period of 10 years.

“The results showed a statistically significant association between consumption of artificial sweeteners and higher risks of diabetes and heart disease, as well as increased weight gain,” lead author of the study, Dr Meghan Azad told the Press Association.

By contrast, soft drinks industry executives said artificial sweeteners had been “deemed safe” by health regulators including the US Food and Drug Administration’s approval.

Artificial sweeteners are synthetic food additives that provide a sweet taste to mimic sugar, while containing significantly fewer calories. Many products which contain them are commonly labelled as ‘reduced sugar’ or ‘diet’ and have intended weight loss benefits which are disputed by the new research.

"Despite the fact that millions of individuals routinely consume artificial sweeteners, relatively few patients have been included in clinical trials of these products,” says the Canadian Medical Institution’s Professor Ryan Zarychanshi.

The amounts of sugar in food and drink Show all 6 1 /6 The amounts of sugar in food and drink The amounts of sugar in food and drink Minstrels A 42g bag contains 28.9g of sugar The amounts of sugar in food and drink Dairy Milk A 49g bar contains 26.8g of sugar The amounts of sugar in food and drink Skittles 45g of Skittles (about a quarter of a large 174g pouch) contains 40.4g of sugar The amounts of sugar in food and drink Ribena A 500ml bottle of Blackcurrant Ribena contains 23g of sugar, down from 50g/500ml after it was reformulated to avoid the government's tax on sugary drinks The amounts of sugar in food and drink Coca Cola A 330ml can of Coca Cola contains 35g of sugar The amounts of sugar in food and drink Innocent Smoothies A 250ml bottle of strawberries & bananas Innocent Smoothie (the middle size) contains 26g of sugar

However, the study says the evidence was conflicting with Dr Azad adding: “caution is warranted until the long-term health effects of artificial sweeteners are fully characterised.”

"Given the widespread and increasing use of artificial sweeteners, and the current epidemic of obesity and related diseases, more research is needed to determine the long-term risks and benefits of these products,” Dr Azad added.