Wondering what to snack on when dieting? 14 foods that are great for weight loss

Wondering what to snack on when dieting? We tried the best snacks for weight loss ourselves

A range of snacks including protein balls and peanut butter on light green background, to represent what to snack on when dieting
(Image credit: Protein Ball Co./Munchy Seeds/Pip& Nut)

Knowing what to snack on when dieting is often the hardest part of changing your eating habits, as many of our go-to snack foods are carbohydrate-based and high in sugar or saturated fats. 

While there's nothing wrong with eating these foods, if you're trying to lose weight and it's not happening, then they could be what's preventing your progress. To lose weight, you have to be in a calorie deficit. This is where you eat fewer calories than you burn every day, and consistently eating higher-calorie snacks alongside regular meals will push you out of this deficit before you know it.

No one should feel pressured to lose weight, but if you are trying to change up your eating habits, having a selection of healthy snacks that are higher in protein, fiber, and healthy fats, and lower in calories may be the way forward. To find out which snacks are best for staying full when dieting, we consulted two nutritionists before trying some of the best weight loss foods ourselves.

What is a healthy snack?

A healthy snack is one that contains a source of protein, fiber, and healthy fats, as these help to keep you fuller for longer, nutritionist Jenna Hope (opens in new tab)explains. Many of us reach for a snack to beat the 3pm post-lunchtime slump, so swapping out a high sugar snack for one that contains these nutrients could make all the difference to your day.

"Additionally, these nutrients will help to slow down the release of any sugars into the bloodstream," she says. "Where possible try to ensure you’re opting for whole foods and those rich in micronutrients." 

Foods rich in micronutrients include:

  • Fruits 
  • Vegetables
  • Nuts
  • Seeds
  • Beans
  • Pulses
  • Wholegrains
  • Fish
  • Good quality meat
  • Eggs

Often when we think of healthy snacking and what to eat on a diet though, low-calorie options come to mind. It's the same with drinking too, with the lowest calorie alcohol being the most popular for anyone looking to lose weight. While it's essential to stay in a calorie deficit to lose weight, that doesn't mean you always have to go for the lowest calorie option. Eating more when snacking could mean that you don't binge on 'unhealthier' foods later on in the day. 

"The narrative is often around calories but it’s important to remember that often very low-calorie foods may not have enough energy to sustain you and therefore you may end up feeling hungrier later on," adds Hope. 

What to snack on when dieting

1. Popcorn

Popcorn is one of the best healthy snacks, great to munch on through the day if you're on a diet as it's high in fiber, one of the most filling micronutrients, according to Purdue University (opens in new tab). But when choosing your popcorn, make sure you're opting for the air-popped kind which is lower in calories, sugar, and saturated fats than the traditional movie-theater kind. 

2. Oatcakes

Oatcakes are one of the best easy, on-the-go snacks to enjoy if you're dieting or looking to lose weight. Famously, oats are nutritious whole, ancient grains that offer a good amount of fiber for the size of the biscuits and slightly higher protein content when compared to other grains. 

3. Protein bars

Protein bars are a natural choice for looking to make the most of the benefits of protein powder, as they tend to contain between 10 and 21g of protein per bar. Along with fiber, protein is another filling nutrient so opting for protein-rich foods over carbohydrates and fats will keep you fuller for longer. 

"Protein is the most effective macronutrient that provides a satiating effect," explains registered nutritionist and dietician, Dr Sarah Schenker (opens in new tab). "So, formulating foods with increased protein content can help to modulate food intake, promoting body weight loss and body weight maintenance," she explains.

4. Crisps

Crisps might not be the first thing that comes to mind when you think of what to snack on when dieting, but if you're a lover of chips then it's going to be very difficult to give them up - so why should you? Gone are the days of deep-fried crisps with sky-high sodium content, many brands are incorporating popular wellness trends into their snacks for the better. 

5. Olives

Olives are a foundation of the Mediterranean diet, typical in countries like Spain, Greece, and Italy. While you might not think of them as a go-to snack when dieting, olives are very high in monounsaturated fats and antioxidants, according to a study by the University of Urbino (opens in new tab)

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Cooks & Co Mixed Pitted Greek Olives with Oregano

Cooks&Co serve up a delicious range of olives and other Mediterranean snacks - including sundried tomatoes, roasted peppers, and antipasti selections (opens in new tab). Available to buy from Amazon in bulk or straight from the Cooks&Co (opens in new tab)website for individual jars, at £1.20 each. 

6. Seeds

Pumpkin, sesame, sunflower, and almost all other types of seeds are exactly what to snack on when dieting if you're looking to stay full between meals and aid digestion. As well as offering that much-needed crunch when you're hungry, pumpkin seeds in particular have been proven to come with a range of health benefits. 

According to research from University College Cork (opens in new tab), they're particularly high in fats and protein with around 7g of protein, 1.7g of fiber, and 13g of fats (including healthy omega 6) per 28g serving. 

7. Boiled eggs

The egg is one food that is great for weight loss thanks to its healthy 77 calories count, 6g of protein, and 5g of healthy fats. But for those particularly interested in maintaining their heart health, eggs can be an essential part of your diet. 

According to research by Loegernes Test Centre (opens in new tab) in Copenhagen, among other studies, eggs raise our levels of high-density lipoprotein (HDL). Often referred to as the 'good' cholesterol, those with higher levels of this tend to have a lower risk of heart disease, stroke, and other adverse health issues.

When it comes to the egg as a snack, Lifesum (opens in new tab)'s nutritionist Signe Svanfeldt (opens in new tab) says that whole grain bread or a rice cake topped with a boiled egg is the way forward. "The whole grain bread has plenty of complex carbs, rich in fiber, and the egg will provide a lot of protein. Top it off with some fresh herbs, pepper, and chilli flakes if you want to add more flavor," she says.  

8. Hummus

Hummus is a snack you can vary in many ways depending on what vegetables you are in the mood for, Svanfeldt says, making it an ideal snack for dieting. 

"The hummus is rich in protein as well as fiber from the chickpeas. If you add tahini, which is a sesame paste, you also get some healthy fats," she says. "Plus, all the vegetables are full of fiber." 

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Ramona's Heavenly Original Houmous 

Available to buy from Sainsbury's and Ocado (opens in new tab) in the UK, Ramona's hummus is a great source of fiber and protein, and it's gluten free. 

9. Nuts

For years we've been told that a handful of nuts makes a great snack - and it's true. Nuts are packed full of macronutrients, with (on average) 5g of protein, 16g of fats, 3g of fiber, and 173 calories per 28g. Some of the best ones to eat to reap the benefits, according to Loma Linda University (opens in new tab), are:

  • Walnuts
  • Almonds 
  • Brazil nuts
  • Cashews
  • Hazelnuts
  • Macadamia nuts
  • Pecans
  • Pine nuts
  • Pistachios

There's even evidence to suggest that nuts can actively help you lose weight. A study from the University of Sao Paulo, for instance, found that participants who were given nuts to eat lost 2 inches from their waistlines. While waistline, much like BMI, is not an entirely accurate or useful way of predicting health as it relates to weight, this was more of a loss than those given olive oil.

"Always keep some in your bag to make sure that you have an emergency snack if you're on the run," suggests Svenfeldt.

10. Apple with peanut butter

Looking for something a little sweet? Try some slices of apple with peanut butter on them. "The best snacks for satiety are those which are rich in protein, fiber, and healthy fats as these have a higher satiety value than simple carbohydrates," says nutritionist Hope.

When choosing peanut butter though, be sure to pick one that's relatively low or absent of added sugar - and watch out for palm oil.

11. Greek yogurt with berries

The benefits of strawberries are famous, so top some Greek yogurt with strawberries and other berries the next time you're struggling to stay full between breakfast and lunch. Compared to regular yogurt, a report by the Agricultural Research Service (opens in new tab) found, Greek yogurt is higher in protein and lower in carbohydrates. 

But it's also rich in other nutrients like B vitamins, selenium, calcium, phosphorus, zinc, vitamin A, and potassium. In smaller quantities, there are nutrients like magnesium, choline, and copper. 

"This is the perfect snack, filled with protein from the Greek yogurt, carbohydrates, and fiber for the berries. Combine with some nuts for healthy unsaturated fats and more protein," Svanfeldt suggests.

12. Chia pudding

Chia seeds are loaded with fiber, making chia pudding one of the best snacks for those dieting or looking to lose weight. In fact, 35% of their total weight is made up with exclusively fiber, according to Sultan Zainal Abidin University (opens in new tab)

To make chia pudding, all you need to do is combine two tablespoons of chia seeds with half a cup of water or milk and leave the mixture in the fridge overnight. 

There's also evidence to suggest that chia seeds are one of the top diet snacks, as according to Hacettepe University (opens in new tab), they can make us feel fuller for longer. The study looked at 24 participants and found that eating 7g of chia seeds mixed with yogurt for breakfast increased feelings of fullness and reduced the amount that participants ate in the short term. 

13. Granola

Granola is a classic breakfast staple, made of toasted rolled oats, nuts, grains, and dried fruit, combined and baked with a sweetener like honey. But it also makes for a great snack, if you pick the right one. 

Various studies, including one by the University of Toronto (opens in new tab),  have looked at the components of granola individually and have found that eating it in moderate quantities can improve blood pressure levels, thanks to high fiber ingredients like oats and flax seeds. While Lancaster University (opens in new tab) found that oats are an excellent source of beta glucan, a particular type of fiber that can reduce bad cholesterol levels known as LDL cholesterol and in turn, help to reduce the risk of heart disease. 

Many of the larger brands mass-produced granola and often add artificial sugars though, so it's always best to make your own or check the label of more independent brands. 

14. Chocolate

You might think that chocolate is off the menu if you're snacking on a diet but that doesn't have to be the case. There's really no such thing as healthy chocolate but dark chocolate with a high cacao ratio is proven to have a range of health benefits that can aid weight loss - including lowering blood pressure. 

Research by the University of East Anglia (opens in new tab) found that cocoa and dark chocolate improved blood flow in participants and lowered blood pressure overall, although the results were mild.

When it comes to weight loss and particularly those trying to get out of emotional eating habits, dark chocolate can offer that slice of sweetness in limited quantities. 

At the end of the day though, if you're dieting and maintaining a strong calorie deficit, a couple of squares of chocolate or any other snack isn't going to make any difference at all. You might find that by continuing to eat your favorite foods in moderate quantities, rather than cutting them out completely, you're less likely to binge on them later on.

And if snacking doesn't end up working for you when you're trying to lose weight, nutritionist Signe Svanfeldt has another idea. "Having well-composed snacks in between larger meals will ensure that you keep your energy levels up and stop you from getting hungry and eating more later on," she says. "But for your wellbeing, you can also plan daily meals so you get enough energy for the whole day based on your individual needs. Including another meal [on top of the standard three and instead of snacking] can help with this, and ensure you stay within the energy requirements." 

Grace Walsh
Grace Walsh

A digital health journalist with over five years experience writing and editing for UK publications, Grace has covered the world of health and wellbeing extensively for Cosmopolitan, The i Paper and more.

She started her career writing about the complexities of sex and relationships, before combining personal hobbies with professional and writing about fitness. Everything from the best protein powder to sleep technology, the latest health trend to nutrition essentials, Grace has a huge spectrum of interests in the wellness sphere. Having reported on the coronavirus pandemic since the very first swab, she now also counts public health among them.