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Health: We eat 200-300 calories more than we need every day says BNF

© Press Association ImagesWe should only be eating a certain amount of some foods.
We should only be eating a certain amount of some foods.

The British Nutrition Foundation (BNF)says many of us are eating too much – so they’ve come up with a practical guide to help.

A healthy, balanced diet isn’t just about what you eat, it’s also about portion size and it can be surprisingly easy to consume too much – especially during the festive season.

According to the BNF, on average, we eat 200-300 calories more than we need every day.

New BNF research found 41% of people tend to finish everything on their plate, even if they’re full.

And while more than three-quarters (78%) of those surveyed said they have portion sizes on their mind when preparing and serving meals, 20% serve themselves large portions at mealtimes, to make sure they don’t feel hungry afterwards.

And when eating less healthy snacks such as chocolate or crisps, 36% said they let the occasion, their mood or hunger levels, dictate the portions.

To help make it easier for people to understand what a healthy-sized amount looks like, without having to go to the trouble of weighing everything, the BNF has launched updated guidance with the new ‘Your balanced diet – get portion wise!’ page on their website.

It includes advice to be used with the UK Government’s visual Eatwell Guide on how often to eat foods from the main food groups, and practical ways of measuring portion sizes for different foods and snacks.

“We want to remind people that eating a healthy diet isn’t just about what we eat, but also how much we’re putting on our plates,” says Sara Stanner, science director at the BNF.

“Most of us will eat more when given bigger portions, so having portion sizes appropriate for our need is important. The aim of the portion size measures in our guide is to give people a quick way to estimate sensible portions, without having to get out the weighing scales.”

However, there are always exceptions to the rule – and portion sizes aren’t a one-size-fits-all guide.

“The portion sizes we give are a starting point – we’re all individuals with different needs,” Stanner adds.

“For some foods, you can use your hands to measure the portions – it’s an easy way to ensure that larger people get bigger portions, and smaller people get less.”


Fruit: About a handful. VEG: About three serving spoons or more

“The main message is to eat more,” stresses Stanner. “Usually, you can eat big portions of these for relatively few calories, so filling your plate with plenty of veg or having fruit-based puddings is a great way to have satisfying portion sizes for fewer calories.”

She recommends including a variety of different fruit and vegetables, and points out frozen and canned veg are still nutritious choices.

Cereal: About three handfuls

Around three handfuls of breakfast cereal is about 40g, which is around 200 calories with half a glass of semi-skimmed milk added, explains Stanner.

“Government guidance suggests having about 400 calories for breakfast,” she says. “So you could have a larger portion of cereal where your calorie needs are higher.”

It’s best to choose wholegrain cereals with a lower sugar content, and add fresh or dried fruit.

Potato: About the size of your fist

A jacket potato the size of your fist will vary a lot between a large person and a small person, Stanner points out.

Rice: About two handfuls

It can be difficult to cook the right amount of pasta and rice, as they expand when cooking.

“Allowing about two handfuls per person is a good place to start, but you can adapt this depending on who you are cooking for,” advises Stanner.

For spaghetti, she suggests using your finger and thumb to make a hole the size of a £1 coin and allowing a portion this size per person.

Chicken: About the size of your whole hand

A portion of grilled chicken breast about the size of your hand is approximately 120g and about 180 calories, says Stanner. If you’re using chicken in a stir-fry or curry, you may need less as you’ll be including other ingredients.

Steak: About the size of your palm

For a lean grilled rump steak, this portion is about 130g and roughly 310 calories, says Stanner. Government advice is to keep to about 70g per day on average of red and processed meat, which is about 500g per week.

“You don’t have to cut out red meat to have a healthy diet – it’s a source of important minerals such as iron and zinc,” she says. “But it’s good to shift towards having more plant-based sources of protein.”

Lentils: About two handfuls

Two handfuls of dried lentils is about 50g, which equates to around 120g cooked weight.

With canned lentils or other pulses, this is equivalent to half a standard can. “We’re recommended to include more beans and lentils in the diet, as they’re naturally low in fat and provide protein and fibre,” says Stanner.

“Choosing more plant-based sources of protein is also one way to make our diets more sustainable.”

Nuts: About the amount you can fit in your palm

Nuts and seeds are nutrient rich but also high in calories, so it’s a good idea to be aware of your portion sizes if you’re concerned about your weight. Stanner says the amount that fits in your palm is about 20g and provides 113-137 calories.

Cheese: About the size of your two thumbs together

Stanner says: “You may find you don’t always want to stick to the portion sizes suggested – for example, if you’re a cheese lover and occasionally want to have more than two thumbs’ worth. But be aware that, depending on your needs, regularly eating large portions can make it more difficult to avoid weight gain.”

Yoghurt: One pot or about four tablespoons

Dairy foods such as yoghurt are important sources of calcium and other nutrients. A portion from an individual pot of yoghurt or four tablespoons is about 120g and, for plain low-fat versions, provides about 68 calories.

Stanner says: “It’s best to go for dairy foods that are green or amber (low or medium) for fat on food labels, as these provide the important nutrients for fewer calories and less saturated fat.”

For plant-based alternatives to dairy foods, look for items fortified with calcium.


Visit nutrition.org.uk