Labour Councillor Neale Gibson, Walkley ward, came under fire when he tweeted saying a 15-year-old girl was responsible for her own death after she had an allergic reaction to a baguette from Pret a Manger.
He said: 'I think the Pret a Manager case shows that if you have an allergy it's your responsibility to to ask the retailer if the item you are purchasing contains the ingredients you are allergic to.
'It shouldn't be the responsibility of the retailer to list every single ingredient.'
The case he referred to was the death ofÂ Natasha Ednan-Laperouse who died in 2016 afterÂ she had an allergic reaction toÂ eating a baguette on a British Airways flight from London to Nice.
It did not have any allergen advice on its wrapper as there was no requirement for it to do so because of reduced labelling requirements.
Following the girl's inquest earlier this month the company have committed to fully labellingÂ ingredients.
In his apology he said: 'A week ago I tweeted about the problems of food labelling and my concerns that I've had for many years that people are not aware of what's in manufactured foods.
'Some people have implied that I was commenting on the tragic death of a young woman. I wasn't.
'I had no intention to cause offence to anyone and I can only apologise if people thought I was. If my choice of words was inappropriate, I'm sorry.
'My concern as always is that I want people to know what they are eating and where it comes from, and to be informed.'
His initial comments sparked back-lash on the social media platform and led Sheffield Labour to commit to disciplining him.
Toby Foster, BBC Radio Sheffield presenter, replied: 'I have read it and re read it. A Sheffield City Councillor has tweeted that a child the same age as my eldest daughter should take some responsibility for her own death. She shouldn't have eaten sesame. It's insane.'
Gibson replied: 'I'm not saying it's her fault. I'm saying that if you have a life-threatening allergy it's your responsibility to ensure that whatever you eat doesn't contain something that's going to kill you. I think people are far too trusting of food labels.'
James Mitchinson, editor of the Yorkshire Post, said: 'Mere hours after a little girl dies through no fault of her own, a Sheffield councillor says this. 'You truly are a piece of work. I'd disown a family member for such crass insensitivityÂ never mind a local councillor.'
LiberalÂ Democrats CouncillorÂ Shaffaq Mohammed referred to a previousÂ comment made by Coun Gibson when he called some of his constituents 'idiots'.
Coun Mohammed said: 'Not the first time that CounÂ Gibson has made insensitive comments online, time the Leader of Sheffield Council CounÂ Julie Dore takes urgent action to discipline him. These comments are totally outrageous and not fitting of a elected representative.'
Coun Gibson later deleted the tweets and made his account private and unable to be seen by people who do not already follow him.
Mr Mitchinson said: 'No councillor '“ nor any other elected-to-power individual '“ should be able to lock their electronic door to their electorate. Stand down or stand up to be counted.'
Coun Peter Rippon, Labour group whip, said: 'These comments are clearly unacceptable and extremely insensitive, they do not reflect the views of Sheffield Labour councillors.
'We will be treating this matter very seriously and will be considering the appropriate disciplinary action to take against the member.'
Only aÂ few people defendedÂ Coun Gibson's comments.
Craige Timmins, an engineer from Leeds,Â tweeted: 'It's insensitive in timing, but he has a point of sorts. There's hundreds of allergies, if you have one, you should be asking if your food contains what your allergic to. Had she done so, she'd have been given a folder which listed the ingredients.'
At a full council meeting the day after the initial post Julie Dore reminded councillors that 'tweets on sensitive subjects do reflect heavily on the chamber as a whole.'