Best Diet Bars Deals Online in the UK (25 Deals Found)

Last Updated - 19/06/2026 Sort By:

Best Choice
SlimFast

New
SlimFast • Meal Replacement Snack Bar • Double Chocolate Flavour • Just 99 Calories • No Artificial Colours, Flavours or
💪 LOSE WIEGHT + KEEP IT OFF WITH 99 CALORIE SNACKS THAT ARE TASTY TASTY GOOD. Fuel your day the easy way. Each bar cont

£18.00
SlimFast

New
SlimFast • Meal Replacement Snack Bar • Chocolate Caramel Flavour • Just 99 Calories • No Artificial Colours, Flavours o
💪 LOSE WIEGHT + KEEP IT OFF WITH 99 CALORIE SNACKS THAT ARE TASTY TASTY GOOD. Fuel your day the easy way. Each bar cont

£18.00
New
The New You Plan Diet, 2 wafer snacks, 15 bars and 2 meals
The New You Plan Diet is a comprehensive meal replacement program designed to help individuals achieve their weight loss

£20.43
Best Value
SlimFast

New
SlimFast Meal Replacement Snack Bar • Salted Caramel Flavour • 211 Cals • 15g Protein • 23 Vitamins and Minerals • Tasty
💪 LOW CALORIE. HIGH PROTEIN SNACK. Fuel your day the easy way. Each bar contains 15g of protein and 6.7g of fibre to he

£6.00 £8.00
New
EONTU delicious shakes & savoury sachets & bars for a VLCD OR LC DIET DIET x112
I have 12 Banana flavours, 9 Cream Chicken flavours, 13 Strawberry flavours, 12 chocolate flavours and Orange & Lemon fl

£52.70
fit bakes

New
Fit Bakes 64 Calories Salted Caramel Bars, Diabetic Chocolate Keto Snack, 1 Net Carb Low Sugar Chocolate Crunch Cakes (1
Low Sugar Healthy Snacks : Our salted caramel chocolate mini crunch bars are just 64 calories for calorie counting, low

£19.99
14% Off
Nature Valley

New
Nature Valley Crunchy Granola Bars Oats 'n' Honey 40 Pack 2 Bars Per Pack
Crunchy bars for breakfast, morning snack or on-the-go snack

£12.49 £14.59
New
Diet Fuel UItralean 4.4KG Meal Replacement Slim Weight Loss Whey Protein Shake
Plus, it’s high in protein to make sure you’re hitting your daily levels, and high in fibre, which is an essential part

£31.99
25% Off
Warrior

New
Warrior RAW Protein Bars 12 x 75g – 20g High Protein Bar, Low Sugar High Fibre Oat Protein Flapjack – Protein Snacks, Me
20G HIGH PROTEIN BAR FOR MUSCLE GROWTH & RECOVERY – Each Warrior RAW protein bar delivers 20g of high-quality protein, t

£11.96 £15.99
New
Shake That Weight Muesli & White Choc Diet Bars 7x60g 222kcal Meal Replacement
In fact, they taste so good you won’t believe you’re eating a weight loss product – plus, they’re individually wrapped s

£19.95
36% Off
Cadbury

New
Cadbury Delights Soft Nougat Hazelnut Flavour & Caramel Bars, Chewy Nougat Bars With Hazelnut & Caramel, Multipack of 5
DELICIOUS TREAT: Indulge in these chocolate bars with soft nougat, salted caramel flavour and hazelnut that will delight

£1.50 £2.33
25% Off
SlimFast

New
SlimFast Meal Replacement Snack Bar • Chocolate Fudge Flavour • 211 Cals • 15g Protein • 23 Vitamins and Minerals • Tast
💪 LOW CALORIE. HIGH PROTEIN SNACK. Fuel your day the easy way. Each bar contains 15g of protein and 6.7g of fibre to he

£6.00 £8.00
New
CWP The 1:1 Diet 21 x Bars 1:1 CWP Products

£50.00
46% Off
Nature Valley

New
Nature Valley Crunchy Oats and Chocolate Cereal Bars, 18 x 42 g
Crunchy bars for breakfast, morning snack or on-the-go snack

£6.30 £11.70
New
CWP The 1:1 Diet Bars x7
CWP The 1:1 Diet Bars x7.

£20.00
25% Off
SlimFast

New
SlimFast Meal Replacement Snack Bar • Dark Chocolate & Cranberry Flavour • 211 Cals • 15g Protein • 23 Vitamins and Mine
💪 LOW CALORIE. HIGH PROTEIN SNACK. Fuel your day the easy way. Each bar contains 15g of protein and 6.7g of fibre to he

£6.00 £8.00
New
CWP The 1:1 Diet 21 x Bars**your choice of flavours **pick 'n' mix!**
21x 1:1 bars. Any flavour combination of your choice! Dark chocolate fruit and nut. Cookies and Cream. Chocolate Mint bi

£53.74
New
1:1 Diet Meal Replacement Fruit And Nut Bar X7
1:1 diet by Cambridge fruit and nut flavoured bars x7

£16.15
New
7 x CWP The 1:1 Diet Bars - Chocolate Chewy Bar
7 x CWP The 1:1 Diet Bars - Chocolate Chewy Bar

£17.22
New
CWP The 1:1 Diet 21 x Bars - Fruit & Nut
CWP The 1:1 Diet 21 x Bars - Fruit & Nut

£50.00
New
SlimFast Diet Snack Bars 24 slimfast Chocolate,Strawberry,Caramel Fast Ship
Made for chocolate lovers, there's a reason we call it heavenly! Chocolate and Nougat Snack Bar An irresistible combinat

£23.89
New
21 x CWP The 1:1 Diet Bars 1:1 Weight Plan - Peanut Crispy Bar
21 x CWP The 1:1 Diet Bars 1:1 Weight Plan - Peanut Crispy Bar

£50.09
New
21 X 1:1 CWP Diet products - Peanut Crispy Bars
21 x 1:1 CWP Diet Peanut Crispy Bars by Cambridge Diet

£50.62
New
Bars 12 x 50g Keto Snacks For Weight Loss Keto Diet Sugar Free Snack Meal
Lemon and Poppy Seed Keto Biscuit Bar (Box of 12). The perfect Keto snack! When we set out to create the perfect Keto Sn

£36.14
New
Meal Replacement 2.2Kg Diet Shakes Slim Weight Loss Whey Protein Shake Powder
Plus, it’s high in protein to make sure you’re hitting your daily levels, and high in fibre, which is an essential part

£20.99

25 Diet Bars deals are available from: Amazon, eBay stores, starting from £1.50.
The biggest discount we found is 46% on Nature Valley Crunchy Oats and Chocolate Cereal Bars, 18 x 42 g at Amazon.
The lowest price we found is £1.50 while the highest is £53.74.
Prices for the best Diet Bars deals average at £24.81.
Last updated on June 19, 2026.
We scanned these quality online stores and more to deliver you with the best offers online available for Diet Bars.