Is your behaviour changed by food and drink?

Kids who behave badly, or struggle to concentrate in lessons, may be doing so because of the food and drink they are eating.

That's according to a survey by the government's food experts, who are warning kids to try to eat fewer sweets and fizzy drinks.

Those things have things called additives put in them to change their flavour, or colour, and it's these additives the experts are worried about.

But do you agree with them?

Do you feel different after a fizzy drink or sweets? Or do you munch on them all day with no effect?

Perhaps you're sick of people telling you what you should or shouldn't be eating!

Whatever your views, email and let us know!

Unfortunately this topic is now closed but there are Comments pages on other subjects on the main Chat index.

Your comments

"I think it's not the sweets that make children behave badly, it's their family life and they only eat sweets as a comfort."

Becky, 12, Birmingham, England

"I used to get effected by sweets and I used to run around and dance, but as I've got older I'm not affected anymore."

Karen, 11, Stockport, England

"I generally think that the food and drink you consume effects your behaviour. If I consumed lots of sweets and fizzy drinks with additives I would be hyper. It is perfectly normal to consume a small amount of sweets or a fizzy drink, as it is part of our diet, just don't eat too many and always maintain a healthy diet by eating 5 portions of fruit and veg a day.'"

Courtney, 10, Huddersfield, England

"Sweets don't make me hyper. Only if I'm really tired and eat loads!"

Lottie, 11, Watford, England

"After lunch-time at school everyone is hyper because they all drink fizzy juice. Our teachers can't control them and we never really get much work done."

Cait, 13, Galashiels, Scotland

"I don't eat too much food that contains additives but my friend does and she's always being rude."

Claire, 12, Brussels, Belgium

"I think food affects our mood and personality."

Genny, 13, Leighton, England

"I don't eat any food or drink containing additives because it flares up my asthma."

Poppy, 9, Sidmouth, England

"I used to be affected by Skips and coloured Smarties so my mum banned me from them because I would have tantrums. But they removed the MSG and E Numbers so now I can eat them and I'm fine - I love it!"

Lindsay, 12, Aberdeen, UK

"What I eat doesn't make me behave differently."

Jessica, 13, Salford, England

"I have never been allowed to have orange juice and cannot have chocolate after 6 o'clock because it turns me into a midnight monster. I think a healthy diet is very important. A small amount of sugary/salty foods is ok, as long as you can balance it out with healthier foods."

Lauren, 10, Nicosia, Cyprus

"Fizzy drinks and sweets don't affect how I behave, but every time my brother has a fizzy drink he goes all stroppy, sarcastic and crabby."

Sophie, 8, Sabran, France

"I understand that loads of sweets and fizzy drinks are unhealthy but it doesn't change my behaviour at all. I can't understand why the government doesn't want us to eat as much."

Tamara, 11, Poole, England

"I get hyper when I have too many sugar-coated doughnuts or non-diet Coke/Pepsi."

Alice, 10, Harlow, England

"I'm not affected by it and I eat sweets once every week. My friend is affected though - he is really hyper when he drinks coke!"

Christopher, 9, Dorchester, England

"It isn't just sweets that can make you hyper. Different types of toys can have the same effect!"

Shannon, 11, Welling, England

"I think this is not a very good opinion. Our attitude doesn't change at all."

Raleigh, 12, Zanesville, USA

"If it's one a day it's not so bad. It really depends on how much you eat."

Anay, 11, USA

"I have a friend who gets very hyper over the slightest bit of sugar!"

Annie, 13, London, England

"Whenever I drink fizzy drinks I go mad, especially at home. I start screaming and running around all over the place. It really does affect my behaviour."

Krupa, 12, Glasgow, Scotland

"Sweets and fizzy drinks make some children go a lot more hyperactive than others. I personally do not go hyper on sweets and fizzy drinks, only on certain sweets. I know that this is the same with other children too, and others are just not affected by it at all."

Amy, 12, Liversedge, England

"I think that it's all psychological. If kids think they're eating something healthy when actually it's full of E-numbers their behaviour wouldn't change, and vice versa."

Collette, 13, Hertfordshire, England

"I love sugar and E-numbers! They make me hyper but they don't affect my behaviour. I don't like fizzy drinks though, or fizzy sweets. I love being hyper!"

Gareth, 12, Cardiff, Wales

"I think children are eating too many sweets. When they go hyper they will disobey rules."

Isaac, 10, England

"I don't get hyper with fizzy drinks and sweets. I don't even like fizzy drinks that much, they make my mouth sore."

Avneet, 12, Bedfordshire, England

"I very rarely get hyperactive or get a sugar rush from sweets or fizzy drinks."

Madi, 10, London, England

"Well it really depends on how many sweets you eat. If it's only one a day then it's not so bad!"

Kirsty, 12, Stirling, Scotland

"I can't eat anything with artificial colourings because it changes me to the extent that I'm ill and act oddly. Sweets and fizzy drinks aren't healthy anyway and if you really cared you'd cut them out of your diet altogether! Once in a while is fine."

Ellecay, 11, Manchester, England

"If I drink cola I go very hyper!"

Caitlin, 12, Lancaster, England

"Some red and blue sweets make me hyperactive and I giggle a lot."

Afitaf, 11, Hackney, England

"Personally, I think it depends how much your intake of sweets is. I have sweets as a treat and I honestly can't feel the difference."

Leah, 13, Yeovil, England

"I saw a show on TV that proved that it's not what kids eat that makes them hyperactive, it's the activities they do. I don't eat a lot of sugar, but I get a bit crazy anyway! I don't think it really matters!"

Ellie, 12, Suffolk, England

"My friend goes so hyper on cola that it's hard to talk to her! It doesn't really affect me!"

Kayleigh, 12, Wales

"I'm always really hyper at school and I don't drink fizzy drinks all day. I think it's because of my friends."

Becca, 12, Northampton, England

"Fizzy stuff only makes me hyper if I'm with my friends."

Gemma, 12, Derry, Northern Ireland

"My brother goes hyper when he eats artificial food colourings. We have to be careful about what he eats."

Sarah, 11, Reading, England

"When I went on my holiday I kept going to the shops to buy ice-cream, chocolate and other sweet stuff. By the end I felt sick, and since then I eat a lot less sweets. The point is that I wasn't behaving badly on holiday."

Anita, 10, London, England

"I drink fizzy drinks all the time, and sometimes eat sweets, and I'm OK."

Matty, 10, Chester, England

"My behaviour changes when I have sugary sweets. This was proven today when me and my friends had lollipops at dinner time and we all went hyper in our next lesson."

Rebecca, 11, London, England

"Sweets can change your behaviour. People act differently to both sugar and e-numbers. Even when I have a little bit of sugar I can have a really big sugar rush."

Page, 13, Aylesbury, England

"My mum has recently put me on a diet to see if my behaviour would change."

Lewis, 10, Stowmarket, England

"If I eat rubbish like ice cream or cake I get hyperactive. But when I drink too much fizzy I am fine, just feel a little ill."

Sacha, 11, Naples, Italy

"It is true, for breakfast today I had a cola and a gummy sweet. So far I'm in lots of trouble with my teacher at school!"

Emma, 13, Kendel, England

"If I drink too much fizzy drink I go hyper and my cheeks go red!"

Molly, 10, Manchester, UK

"Yes - sometimes if I eat too many sweets or drink too much cola I get a sugar rush."

Alex, 13, Kendal, England