Snacks That Help With Weight Loss: What to Eat and How Much

The snacks that help with weight loss are the ones that fill you up on few calories: water-rich fruit and vegetables, fibre-rich whole grains, and a little protein, eaten in one sensible portion. A snack that does this keeps you away from the vending machine at 4pm. A snack that doesn’t, however “healthy” the packet looks, simply adds calories. Below you’ll find what works, how much to eat, how to read a label, and where a vegan popcorn habit can fit. We make vegan gourmet popcorn at PopCornaa, so we have thought about this a lot, and as a parent I have stood in plenty of kitchens at 9pm asking the same question.

TL;DR

• Aim for snacks of roughly 100 to 250 calories, built from fibre, water and protein, rather than from fat or sugar alone.
• Fresh fruit beats dried fruit for fullness: Mayo Clinic compares 1 cup of grapes at about 104 calories with 1 cup of raisins at about 480.
• “Low fat” does not mean “low calorie”, so check the per-serving energy on the label.
• Plant-based options such as roasted chickpeas, edamame, hummus with vegetables and popcorn all appear on dietitian lists.
• Portion is the lever: put your snack in a bowl, never eat from the bag.

What makes a snack help rather than hinder

A snack helps when it takes the edge off hunger so that your next meal is calmer, not bigger. Two things do most of the work.

The first is energy density, which simply means how many calories sit in a given weight of food. A 2017 review of dietary management of obesity explains that low-energy-dense foods let you eat a larger portion for fewer calories. Water and fibre lower the density, while fat is the most energy-dense nutrient. That is why a bowl of cherry tomatoes feels like a lot of food, and a handful of oily nuts feels like very little.

The second is the mix of nutrients. Harvard Health says the most satiating snacks combine protein, fat and carbohydrate, and its example is whole-grain crackers with low-fat cheese and a little dried fruit. Mayo Clinic adds that water-rich fruit and vegetables, fibre-rich whole grains and lower-fat protein foods help people feel full on fewer calories, with beans, peas and lentils among its examples.

There is a flip side. The American Institute for Cancer Research notes that even nutritious snacks can contribute to weight gain if portions are too large or snacks are eaten too often. Its dietitian-recommended snacks generally sit around 150 to 250 calories. So the goal is not endless grazing on virtuous food. It is one planned snack, sized properly.

Snacks worth keeping in the cupboard

Here is a practical shortlist, drawn from official and professional guidance, grouped by what each does for you.

The Academy of Nutrition and Dietetics recommends combining fruit or vegetables with whole grains, lean protein and healthy fats. Think of that as a formula: one thing that crunches, one thing that fills. An apple on its own is fine. An apple with a spoonful of peanut butter lasts longer.

If you want more ideas in this vein, our own guides to good high fibre snacks and good protein snacks go further into each.

How much is one portion?

Portion size is where good intentions usually fall apart, so it helps to see real numbers. The British Heart Foundation lists snacks of about 100 calories, including:

• 40 g of blueberries with 125 g of plain low-fat yoghurt
• an apple with half a tablespoon of pure peanut butter
• 50 g of low-fat cottage cheese with tomatoes on one rice cake
• reduced-fat hummus with a pepper
• three dried apricots with eight almonds

NSW Health’s low-calorie snack guide uses the same 100 kcal yardstick: an apple, 100 g of low-fat yoghurt, 14 almonds, or 1.5 cups of homemade popcorn made without added fat. It also warns that nuts are healthy but high in calories, so keep to small amounts, and that low-fat foods still contain calories.

Cleveland Clinic gives more generous portions for when you need something more substantial: half a cup of shelled edamame, half a cup of roasted chickpeas, or a cup of raw vegetables with a quarter cup of hummus.

A simple rule: decide the portion before you start, put it in a bowl, and put the packet away. It sounds small. It is the single habit I would keep if I could keep only one.

Low fat is not the same as low calorie

People searching for a good low-fat snack often assume the two terms mean the same thing. They don’t, and the labelling rules explain why.

The American Heart Association defines low-fat as 3 g of fat or less per serving, and low-calorie as 40 calories or less per serving. Reduced-fat means at least 25% less fat than the regular version of that product. These are US definitions, and UK front-of-pack claims follow their own rules, but the principle travels: a claim describes one nutrient, not the whole snack.

The US National Heart, Lung, and Blood Institute warns that fat-free or reduced-fat products are not necessarily low in calories, because manufacturers may add sugar or other ingredients that carry calories. Its example is a fat-free caramel topping with 103 calories in two tablespoons.

So a good low-fat snack is usually one that is low in fat naturally: fruit, vegetables, plain yoghurt, whole-grain crackers, popcorn made without lots of oil. Then check the calories anyway.

Reading the label in thirty seconds

Packaged snacks can fit a weight-loss plan if you read the panel properly. Three checks do most of the work.

1. Serving size. New Mexico State University’s label guide points out that the calories and nutrients shown apply to one serving, which is not always the whole package.
2. Calories and total fat together. The same guide advises comparing both when you weigh a regular product against a low-fat one.
3. Sugars, saturated fat and sodium. The Academy of Nutrition and Dietetics suggests comparing labels to limit these, and Australia’s National Diabetes Services Scheme recommends reading the ingredients list alongside the nutrition panel.

In the UK, per-100g figures are on the back of the pack, so you can compare one product with another fairly. Then do the sum for your portion.

Plant-based snacks that keep you full

If you are vegan or cutting back on dairy, the good news is that most of the best-evidenced snacks are already plant-based. The Academy’s plant-based and vegetarian-friendly list includes roasted chickpeas, hummus with vegetables, avocado, edamame, nut or seed butter, popcorn and whole-grain cereal. The American Institute for Cancer Research adds that chickpeas, beans, nuts, seeds, vegetables and fruit can combine to give protein and fibre.

A few combinations I come back to:

• Hummus and raw vegetables. Crunch, protein and fibre, and easy to portion.
• Edamame in the pod. Slow to eat, which helps you notice when you are full.
• Roasted chickpeas. A crunchy swap for crisps, with a half-cup portion as a sensible guide.
• Fresh fruit rather than dried. Mayo Clinic’s grapes-versus-raisins example shows how quickly dried fruit adds up.

Protein matters most when a snack has to stand in for a small meal. If you want a fuller plant-protein idea for lunch or a post-workout bite, this 25g plant protein bowl shows how protein, carbohydrate and fibre can sit in one dish.

Where popcorn fits

Popcorn turns up again and again on professional lists. MedlinePlus names air-popped popcorn among its whole-grain examples, the Academy includes it in its plant-based ideas, and NSW Health’s 100 kcal example is 1.5 cups of homemade popcorn with no added fat. It is a whole grain, it is crunchy, and a large bowl looks like a lot of food, which is exactly the low-energy-density effect described earlier.

The catch is the same as for every snack: what is added, and how much you eat. EatingWell advises portioning popcorn into a bowl and avoiding large amounts of butter and salt, especially for an evening snack.

We have written about this in more depth if you want it: the healthiest way to make popcorn, whether popcorn is a healthy snack, and how to compare popcorn for weight loss. For a plant-based angle, there is also our guide to vegan, low-calorie snacks in the UK, and one on portion-sized packs.

Evening snacks that don’t undo your day

The evening is when most people struggle, because snacking becomes habit and boredom rather than hunger. EatingWell’s dietitian-led list suggests string cheese, Greek yoghurt with berries, popcorn, nuts, or whole-wheat toast with peanut butter. It reports that a part-skim mozzarella stick gives about 100 calories and 7 g of protein, and that protein and fibre are the features to look for in a satisfying late snack.

For a plant-based evening, swap in hummus with vegetables, edamame, or a measured bowl of popcorn. Whatever you pick, serve it in a bowl, sit down, and finish it before you decide whether you want more.

A simple plan for the week

You don’t need a spreadsheet. Try this:

1. Choose two fresh options (say apples and carrots) and one filling pairing (hummus or nut butter).
2. Pre-portion a crunchy snack, whether roasted chickpeas or popcorn, into small containers on Sunday.
3. Keep one planned treat, so that a craving has somewhere to go.
4. Check the per-serving calories on anything packaged.

If you have a medical condition, are pregnant, or take medication affected by diet, talk to your GP or a registered dietitian before changing how you eat. They can tailor calorie targets to you in a way no list can.

Our view on snacking and weight

Snacking gets a bad name, and I think that is unfair. When I became a parent I started reading every label, and I realised how many “healthy” snacks were healthy mostly on the front of the packet.

What I believe is this: a snack should taste like something you chose, not something you settled for. If it is dull, you will eat three of something else afterwards. That is why we make our popcorn vegan, with clean natural ingredients and flavours inspired by Asian and British kitchens, and why our facility is free of major allergens.

Popcorn is a whole grain, it is crunchy, and it suits a bowl. Pair it with fruit, or keep it as your planned evening treat, and enjoy it without guilt. The portion is yours to set, and the flavour is ours to get right.

Emily

Try a taster box

If you would like to find your favourite flavour before committing to a big bag, our Newbie Asian Fusion Taster Box holds five bags of vegan popcorn for £17.99. Our Asian Sweet Bliss Box has nine bags for £25.95, and the Ultimate Asian Sampler Box has twelve for £32.95.

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Want something more personal? You can build your own snack mix, or send a PopCornaa gift card, available from £10, to someone who is trying to snack more mindfully. Offices and shops can ask about our snack bags and bulk sharing bags.

FAQ

What is the best snack for weight loss?

There is no single best snack. The most useful ones combine fibre or water with some protein, such as an apple with a little nut butter or carrots with hummus. Keep to one portion of around 100 to 250 calories, which is the range the sources above use.

What is a good low-fat snack?

Choose foods that are low in fat naturally, such as fruit, vegetables, plain low-fat yoghurt or whole-grain crackers. The American Heart Association defines low-fat as 3 g of fat or less per serving. Always check calories too, because reduced-fat products can contain added sugar.

Is popcorn good for weight loss?

Popcorn is a whole grain, and professional lists such as the Academy of Nutrition and Dietetics include it among their plant-based snack ideas. Eat it in a measured bowl and go easy on butter and salt. Our guide to popcorn and weight loss gives more detail.

What can I eat in the evening without overdoing it?

Try Greek yoghurt with berries, string cheese, a small bowl of popcorn, or hummus with vegetables. Aim for protein and fibre, portion it into a bowl, and sit down to eat it.

Sources

• Low-calorie snacks: healthy, delicious, and satisfying options, Harvard Health
• Dietary management of obesity: cornerstones of healthy eating patterns, PMC
• 30 healthy snack ideas from registered dietitians, American Institute for Cancer Research
• Low-calorie snack guide for weight control, NSW Health
• Snacks for adults, MedlinePlus
• Weight loss: feel full on fewer calories, Mayo Clinic
• Smart snacking tips for adults and teens, Academy of Nutrition and Dietetics
• The best lower-calorie (100 calories) snacks, British Heart Foundation
• Easy-to-make low-calorie snacks, Cleveland Clinic
• Making sense of food packaging claims, American Heart Association
• Limit fat and sugar, NHLBI
• How to read a nutrition label, New Mexico State University
• Understanding food labels, National Diabetes Services Scheme
• Best and worst late-night snacks, EatingWell

Recommended

• Best vegan, low-calorie snacks for weight loss UK
• Good protein snacks that actually keep you full
• Good High Fibre Snacks: 12 Ideas That Actually Fill You Up
• Best Popcorn for Weight Loss – Expert Comparison 2025