Best Diet Bars of 2025

Phoebe Cooper Avatar
Phoebe Cooper
Last Updated: 2 Feb 2025

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Diet bars are a convenient and healthy snack option for people who are always on-the-go. These bars are designed to provide a balanced mix of nutrients, including protein, fibre, vitamins, and minerals, while keeping the calorie count low. They come in a variety of flavours, from chocolate to fruit and nut, and are often fortified with additional ingredients such as probiotics or omega-3 fatty acids. Diet bars are an ideal choice for those looking to manage their weight or maintain a healthy lifestyle without sacrificing taste or convenience.

At a Glance: Our Top Picks

SlimFast Choc Caramel Low Calorie Snack Bars Cover #TOP 1
SlimFast Choc Caramel Low Calorie Snack Bars
ftb score rating icon 9.9
Skinny Cereal Bars with Kitchenfella Healthy Eating Guide Cover #TOP 2
Skinny Cereal Bars with Kitchenfella Healthy Eating Guide
ftb score rating icon 9.8
Fitbakes Low Calorie Belgian Chocolate Bars Cover #TOP 3
Fitbakes Low Calorie Belgian Chocolate Bars
ftb score rating icon 9.6

Top 10 Diet Bars

#TOP 1

SlimFast Choc Caramel Low Calorie Snack Bars

SF515380
6 Count (Pack of 5)
SlimFast Choc Caramel Low Calorie Snack Bars Cover
SlimFast Snack Bar, Low Calorie Snack, Choc Caramel Flavour, 30 X 26 G Multipack (Packing May Vary)

The SlimFast Snack Bars are a delightful low-calorie treat, with each bar containing just 99 kcal. They provide a quick and simple snack option, making them perfect for enjoying at home or on the move. With their sweet and indulgent Choc Caramel flavour, these bars help satisfy your sweet tooth while keeping you on track with your dietary goals. Incorporating these bars into your day can assist you in your weight loss journey as part of the SlimFast 3.2.1 plan, or simply as a tasty addition to a balanced diet.

What We Like
Low-calorie option
Convenient on-the-go snack
Satisfies sweet cravings
Supports weight loss plan
#TOP 2

Skinny Cereal Bars with Kitchenfella Healthy Eating Guide

kitchen fella
Skinny Cereal Bars with Kitchenfella Healthy Eating Guide Cover
Skinny Cereal Bars Toffee, Chocolate Orange, Double Chocolate and Coconut and Dark Chocolate Whip with Kitchenfella Healthy Eating Guide

Skinny Whip Bars offer a delicious and guilt-free snacking option with a variety of flavours, including Toffee, Chocolate Orange, Double Chocolate, and Coconut & Dark Chocolate. Each 20g bar is high in fibre and contains less than 80 calories, making them ideal for a mid-afternoon pick-me-up or a lunchbox treat. You can indulge your sweet tooth without the guilt, and the inclusion of the Kitchenfella 14 Day Healthy Eating Challenge encourages a balanced approach to nutrition. Enjoy a tasty and convenient snack that supports your healthy lifestyle.

What We Like
Low-calorie options available
High in fibre
Variety of flavours
Perfect for lunchboxes
Includes healthy eating guide
#TOP 3

Fitbakes Low Calorie Belgian Chocolate Bars

fit bakes
Fitbakes Low Calorie Belgian Chocolate Bars Cover
Fitbakes 64 Calories Belgian Chocolate Mini Bars (12x19g) Diabetic Chocolate Keto Snack, 1 Net Carb Low Sugar Bar, Diabetic Sweets Biscuits, Low Calorie Snack, No Added Sugar, Fit Bake

Fitbakes Chocolate Mini Bars are a delightful treat for those seeking low-calorie snacks. With just 64 calories and less than 1g of sugar per bar, you can indulge without guilt. These bars are perfect for anyone following a keto or Atkins diet, providing a satisfying chocolate fix with only 1 net carb. Additionally, they make an excellent gift for diabetics, as they are specifically designed to be safe and enjoyable for those managing their sugar intake. You’ll also benefit from 5g of fibre per bar, promoting gut health.

What We Like
Low calorie and low sugar
Keto and Atkins diet friendly
Ideal for diabetics
High in fibre
Award-winning snack
#TOP 4

Shake That Weight Dark Chocolate Meal Bars

Shake That Weight Dark Chocolate Meal Bars Cover
10x Dark Chocolate Diet Meal Bars (56g each)

Shake That Weight Bars are designed to help you reach your weight loss goals effectively. These low-carb meal replacement bars support rapid weight loss through a very low calorie diet (VLCD). With their delicious dark chocolate flavour, they can easily be incorporated into your diet plan, offering a tasty alternative to traditional meals. Each bar is high in protein and fibre, helping to reduce hunger pangs and keep you feeling satisfied throughout the day. Enjoy these bars as nutritious treats without the feeling of dieting.

What We Like
Supports weight loss goals
Delicious dark chocolate flavour
High in protein and fibre
Reduces hunger pangs
Convenient meal replacement option
#TOP 5

SlimFast Very Berry Meal Replacement Bars

SF500172
SlimFast Very Berry Meal Replacement Bars Cover
SlimFast Tasty Balanced Meal Bar, Low Calorie Replacement Bars for Weight Loss and Diet, High Protein, Healthy Snacks for Adults with 23 Vitamins and Minerals, Very Berry Flavour, Multipack, 16 x 60 g

The SlimFast Meal Bars are convenient, ready-to-eat snacks designed to support your weight loss journey. Each bar packs 14-15 grams of protein and contains less than 230 kcal, making them an ideal low-calorie option. With 23 essential vitamins and minerals, they provide nutritional benefits that help you maintain your energy levels. The bars come in four delicious flavours, including Very Berry, ensuring that you can enjoy a tasty treat without guilt. They're perfect for satisfying hunger as part of a balanced diet or the SlimFast 3.2.1 plan.

What We Like
High protein content
Low calorie option
Rich in vitamins and minerals
Available in tasty flavours
Convenient meal replacement
#TOP 6

Skinny Whip Chocolate Orange Bars x3 Packs

kitchen fella
Skinny Whip Chocolate Orange Bars x3 Packs Cover
Skinny Whip Bars Chocolate Orange x3 Packs and Kitchenfella Top 10 Movie Treats

Skinny Whip Bars are a delightful snack option, perfect for satisfying your sweet cravings without the guilt. Each bar boasts a delicious chocolate orange flavour that is sure to please your taste buds. With fewer than 80 calories per bar, they are an ideal choice for those watching their calorie intake. Additionally, these bars are high in fibre, helping you feel fuller for longer. Plus, they are suitable for vegetarians, making them a versatile treat for various dietary preferences. Enjoy the included top 10 movie treats guide from Kitchenfella to enhance your snacking experience!

What We Like
Low calorie option
High in fibre
Vegetarian friendly
Delicious chocolate orange flavour
Includes movie treats guide

Keto Keto Bars Cherry Bakewell Vegan Snack

Keto Keto
21368
1 count (Pack of 1)
Keto Keto Bars Cherry Bakewell Vegan Snack Cover
Keto Keto Bars 12 x 50g Keto Snacks For Weight Loss | Keto Diet, Sugar Free Snack, Meal Replacement Bar | Healthy Snacks, Keto Food, Low Carb | Low Calorie, Vegan Food, Breakfast Bar (Cherry Bakewell)

Keto Keto Bars are a delicious vegan treat designed for those on a fat loss or keto diet. After years of development, these bars have achieved 100% Ketogenic scores, ensuring they won't spike your blood sugar. With no dairy and no sugar, they are perfect for anyone seeking a healthy snack. Available in multiple flavours, these tasty bars prioritise flavour, so you can enjoy a satisfying treat while maintaining your dietary goals.

What We Like
Delicious vegan options
100% Ketogenic scores
No sugar spikes
Multiple flavours available
Great for low-carb diets
#TOP 8

Slimming World Triple Chocolate Snack Bars

Slimming World Triple Chocolate Snack Bars Cover
Slimming World Triple Chocolate Bars, 20g each, 2 Packs of 6 Bars

The Triple Chocolate Bars offer an indulgent treat with their rich, decadent flavour that satisfies your chocolate cravings. Each bar is 20g, making it perfect for portion control while still providing a satisfying snack. Conveniently packaged in two pouches of six, you can easily grab a bar whether you're at home or on the go. Designed for those following the Slimming World plan, these bars allow you to enjoy a sweet treat without the guilt.

What We Like
Delicious chocolate flavour
Portion-controlled size
Convenient on-the-go packaging
Suitable for Slimming World plan
#TOP 9

Slimming World HiFi Bars Variety Pack

TBD GIFTTING
1 count (Pack of 3)
Slimming World HiFi Bars Variety Pack Cover
Slimming World HiFi Bars 3 Boxes (Peanut Butter, Choc Orange, Fruit & Nut, Flavours) by TBD365 GIFFTING

The HiFi Slimfast Bars offer a delicious way to enjoy a variety of flavours while maintaining your diet. With options like Peanut Butter, Choc Orange, and Fruit & Nut, you'll find a snack to satisfy your cravings. These diet bars are convenient for on-the-go snacking, making it easier for you to stick to your dietary goals. Each bar is designed to be both tasty and fulfilling, helping you manage your hunger throughout the day.

What We Like
Delicious variety of flavours
Convenient for on-the-go
Supports dietary goals
Fulfilling and tasty
#TOP 10

Skinny Crunch Light Raspberry & White Chocolate Bars

kitchen fella
Skinny Crunch Light Raspberry & White Chocolate Bars Cover
Skinny Crunch Bars Light Raspberry and White Chocolate x3 Packs with Kitchenfella Healthy Challenge

The Skinny Crunch Light Bars offer a delicious guilt-free snack option with their freeze-dried raspberry pieces and a drizzle of white chocolate coating. Each bar contains less than 70 calories, making them a great choice for those mindful of their diet. They are high in fibre, which can help you feel fuller for longer, and suitable for vegetarians, catering to a variety of dietary preferences. With at least 20% less fat compared to regular Skinny Crunch bars, you can indulge without the guilt.

What We Like
Low calorie option
High in fibre
Suitable for vegetarians
Less fat than regular bars
Includes healthy eating challenge
Buying Guide Image

Frequently Asked Questions (FAQs)

1. Do weight loss bars work?

Protein bars can be a good source of calcium, potassium, vitamin B, fiber, and iron. They can also help you gain muscle mass and can even promote weight loss. In addition, protein bars can be a good meal replacement or post-workout snack.

2. Can you lose weight just eating protein bars?

Eating a protein bar for a meal can be an effective way to lose weight, because you are controlling the amount of calories consumed. Bars are easy to carry with you. On the negative side the bars tend to be expensive, and some people may not like the taste.

3. What is the diet bar?

Have you heard about the latest low calorie fiber sweetener? Diet Bar by Prozis is packed with isomalto-oligosaccharides, or IMOs: a low calorie fiber sweetener. As a naturally sweet fiber with prebiotic properties, IMO makes you feel fuller for longer, helping you control your appetite throughout the day.

4. Can you have 3 bars a day on exante?

Some diet companies have 4 meal replacements a day to give their clients 100% RDAs but Exante Diet products contain more volume per pack therefore 3 a day is sufficient.

Editor's Notes

During our diet bar research, we found 31 diet bar products and shortlisted 10 quality products. We collected and analyzed 40,079 customer reviews through our big data system to write the diet bars list. We found that most customers choose diet bars with an average price of £17.84.

The diet bars are available for purchase. We have researched hundreds of brands and picked the top brands of diet bars, including SlimFast, kitchen fella, fit bakes, Shake That Weight, Keto Keto.

Written by
Phoebe Cooper Avatar

In 2000, Phoebe Cooper graduated from the University of London as a Pharmacist. She practiced as a Pharmacist for the better part of 2 decades. Phoebe says she has worked in the majority of health sectors and has sufficient accumulated knowledge and experience. In her practice, Phoebe published a series of eBooks, one of which is titled "Good Health Good Living."