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By Esme StallardClimate and science reporter, BBC News

Twenty years ago, no-one had heard of The term ultra-processed foods - or UPF - But about half The things we now eat in The UK are made That way.

From sliced Brown Bread to ready meals and Ice Cream , it is a group of foods made with varying - But often Substantial - levels of industrial processing. Ingredients used, such as preservatives, artificial sweeteners and emulsifiers, do not typically feature in home cooking.

" Ultra-processed foods are among The Most profitable foods companies can make, " says Prof Marion Nestle , a Food politics expert and professor of nutrition at New York University .

As our consumption of ultra-processed foods go up - - so.

Some academics think The Link is not coincidental.

Prof Tim Spector , is a professor of epidemiology at King's College London, who studies trends in disease.

He told BBC Panorama : " In The Last Decade , The Evidence has been slowly growing That ultra-processed Food is harmful for us in ways we hadn't thought.

" We're talking about a whole variety of cancers, heart disease, strokes, dementia. "

In January, on ultra-processed Food - by Imperial College's School of Public Health - was published in The Lancet medical journal.

The study of 200,000 UK adults found That higher consumption of ultra-processed foods may be linked to an increased risk of developing cancer overall, and specifically ovarian and brain cancers.

And, as of last month, against The long-term use of artificial sweeteners - citing potential Health risks.

It Follows linking increasing consumption of UPF to increased risk of developing serious illnesses.

But - There are a range of other factors in our lifestyles That can cause these diseases. For example: lack of exercise, smoking or sugary diets.

The First investigations into mortality and consumption of ultra-processed Food started in France at The University Sorbonne Paris Nord, as part of The ongoing study into The eating habits of 174,000 people.

" We have 24-hour dietary records during which They tell us all The foods, The beverages and so on, That They are eating, " explains Dr Mathilde Touvier who heads up The study.

The ongoing Research has showing UPF may drive an increased burden of cancer.

Emulsifiers - The Holy Grail

More recently, They have been looking into The impact of one specific ingredient - emulsifiers - which act as a glue in ultra-processed foods to hold everything together.

Emulsifiers are The Holy Grail for The Food Industry - They improve The Appearance and texture of Food , and help to extend The Shelf Life far beyond That of less-processed Food .

They 're everywhere, in mayonnaise, chocolate, Peanut Butter , meat products. If you eat, you're likely to be consuming emulsifiers as part of your diet.

BBC's Panorama was given exclusive access to Dr Touvier's early results.

They are yet to be peer reviewed - a crucial verification step for scientific studies - But She Said They are still concerning.

" We observed significant associations between emulsifier intake and increased risk of cancer overall - and breast cancer notably - But also with cardiovascular diseases, " she says.

This means That a pattern has been observed between consuming ultra-processed Food and disease risk, But further Research is needed.

Despite The growing body of Evidence , The UK's Food Standards Agency (FSA) - which regulates The Food Industry in England, Wales and Northern Ireland - has yet to issue any regulation restricting emulsifiers.

When Panorama asked The FSA about The growing body of Evidence That these additives could cause harm it said: " We have not been presented with any Evidence - by this programme or Otherwise - of any specific emulsifiers which are believed to pose a risk to Health . "

But The FSA said it planned to hold a public consultation.

Could The Food Industry itself be playing a role in pushing back on regulation?

The Bbc Panorama team spent The Past eight months investigating.

" Food companies are not Public Health agencies. . their job is to sell products, " Food politics expert Prof Nestle told The Bbc .

She Said The Food Industry has been known to fund Research , sponsor experts and disparage existing studies to prevent regulation.

Ultra-processed convenience foods contain chemicals That UK regulators say are safe, But Panorama investigates emerging scientific Evidence of a link between some of these chemicals and cancer, diabetes and strokes.

Watch on , or on Bbc One at 20:00 BST on Monday 5 June (20:30 in Northern Ireland and 23:10 in Wales)

The International Life Sciences Institute (ILSI) is a body That

It says its mission is to " provide science That improves human Health " - But it has previously published studies globally. In 2012, The European Food Safety Agency was so worried about potential conflicts of interest, it insisted anyone associated with ILSI either had to resign from The Institute or leave The Agency .

Prof Alan Boobis, emeritus professor at Imperial College London, is an unpaid director of ILSI Europe and a former Vice President of its board of directors. But he also heads up a group of UK scientists, known as The Committee on Toxicity which provides advice on The Risk of chemicals in Food to The FSA.

More Than half The Members of The Committee . And over The Past 10 Years , The Committee hasn't supported a single restriction on The use of any chemical additive in our Food .

Prof Boobis told Panorama his advice wasn't slanted to favour Industry , and he had always been " totally committed to conducting and identifying The very best scientific Research . . whoever is funding it. "

The Food Standards Agency said it had a " clear code of conduct… for declarations of interest" and That it had " no Evidence " bias has affected its decisions.

ILSI said: " [We] operate within a framework of The highest principles of scientific integrity. "

Aspartame, sweeter than sugar

One of The Most controversial additives in UPF is The sweetener aspartame.

Two-hundred times sweeter than sugar, it has been heralded as a great low-calorie alternative - Turning once unhealthy sugary drinks, Ice Cream and mousses into products marketed as " healthy".

There have been questions about its potential harm over The Past two decades.

Then, last month, The World Health Organization said, although The Evidence is not conclusive, it was concerned That long-term use of sweeteners like aspartame may increase The Risk of " type 2 diabetes, heart diseases, and mortality".

In 2013, The European Food Safety Authority (EFSA) Decided - After looking at all The available Evidence - That aspartame was safe. The UK's Food Standards Agency accepted this position.

The Committee on Toxicity and concluded That The results " did not indicate any need for action to protect The Health of The public".

Six Years later, Prof Erik Millstone , emeritus professor of science policy at The University of Sussex, Decided to review The same Evidence considered by EFSA - to see who had funded The different studies.

He discovered That 90% of The studies defending The sweetener were funded by large chemical corporations That manufacture and sell aspartame.

And That all The studies suggesting That aspartame may cause harm were funded by non-commercial, independent sources.

A spokesperson for The Food and Drink Federation, a membership body for manufacturers, told The Bbc That companies took " The Health of consumers, and safety of The Food They produce, seriously - and adhere to The strict regulations".

The FSA says it will look into WHO's ongoing assessment of aspartame.

The of The growing concerns around UPF and has ordered a review into The Evidence on ultra-processed foods.

Watch Panorama - Ultra-Processed Food : A Recipe For Ill-Health ? - on or on Bbc One at 20:00 BST on Monday 5 June (20:30 in Northern Ireland and 23:10 in Wales)

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Source of news: bbc.com