An expert panel expressed differing views on the proposed sugar tax to young Chai Cancer Care supporters at a forum at the charity's Hendon premises.
During a lively discussion, nutritionist Ian Marber pointed out that sugar was not the sole cause of obesity. "It's that we eat too much and we need to find ways to eat less.
"If that means taxing things, personally I'm very uncomfortable with that. Professionally, I think it has some merit."
Mitch Minton, CEO of Presscription - which produces raw, organic and cold-pressed juices - observed that with the NHS "extremely stretched, it's a good initiative to potentially reduce the amount of sugar consumed and save the NHS some money".
Asher Budwig, chief executive of Lola's Cupcakes, believed that if a sugar tax was extended to his products, the impact would not be significant.
"People come to us once a week or once a month so I don't think we would see a major decline.
"A cake is a lovely treat and if you can't enjoy a cake as a treat, what can you enjoy?"
Panellists were also quizzed on the role of the media in influencing eating habits and how to better educate regarding a balanced lifestyle.
The night raised more than £1,000 for Chai.