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5 Best Diet Shakes of 2026

Last Updated - 01/04/2026

1
Best Choice
23% Off

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

USN
23% Off

USN I Diet Fuel Ultralean Meal Replacement Shake (Strawberry, 2kg - 36 Servings/Meals) High Protein, Low Calorie Drink to Support Weight Loss & Balanced Diet I Added 24 Vitamins & Minerals

USN

£34.75

£45.00
(23% Off)

More Details
Main highlights
- YOUR NEW MORNING ROUTINE: Get your day off to the best possible start with these fantastic, and delicious, USN Meal Replacement Shakes. You don’t need to go without breakfast to help you lose weight - one quick shake and you are ready to take on the day!
- USN HIGH PROTEIN SHAKE POWDER: Use Diet Fuel Meal Replacement Shakes to help you reach your weight-loss goals. Perfect support for a low-calorie diet - a quick & easy way to get what your body needs, without the calories. Packed with 24 Vitamins & Minerals.
- ULTIMATE SPORTS NUTRITION: USN are at the forefront of sports nutrition research, making effective sports nutrition supplements for professional and non-professional athletes, pre or post workout. Science-driven nutrition so we can achieve together.
- HIGH PROTEIN MEAL REPLACEMENT: Protein is absolutely vital if you are looking to lose weight. When we take protein on board, it triggers our satiety hormones, which make us feel full. USN meal replacement shakes have 25g of protein per serving.
- FEEL FULL FOR LONGER: USN’s meal replacement powder has been specially formulated by a dedicated team to ensure you feel full for longer, reducing the need to snack or over-eat and supporting a reduced calorie diet - to help you reach your weight goals.
£34.75
£45.00 (23% Off)
2
31% Off

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

USN
31% Off

USN I Diet Fuel Ultralean Meal Replacement Shake (Strawberry, 2kg - 36 Servings/Meals) High Protein, Low Calorie Drink to Support Weight Loss & Balanced Diet I Added 24 Vitamins & Minerals

USN

£31.27

£45.00
(31% Off)

More Details
Main highlights
- YOUR NEW MORNING ROUTINE: Get your day off to the best possible start with these fantastic, and delicious, USN Meal Replacement Shakes. You don’t need to go without breakfast to help you lose weight - one quick shake and you are ready to take on the day!
- USN HIGH PROTEIN SHAKE POWDER: Use Diet Fuel Meal Replacement Shakes to help you reach your weight-loss goals. Perfect support for a low-calorie diet - a quick & easy way to get what your body needs, without the calories. Packed with 24 Vitamins & Minerals.
- ULTIMATE SPORTS NUTRITION: USN are at the forefront of sports nutrition research, making effective sports nutrition supplements for professional and non-professional athletes, pre or post workout. Science-driven nutrition so we can achieve together.
- HIGH PROTEIN MEAL REPLACEMENT: Protein is absolutely vital if you are looking to lose weight. When we take protein on board, it triggers our satiety hormones, which make us feel full. USN meal replacement shakes have 25g of protein per serving.
- FEEL FULL FOR LONGER: USN’s meal replacement powder has been specially formulated by a dedicated team to ensure you feel full for longer, reducing the need to snack or over-eat and supporting a reduced calorie diet - to help you reach your weight goals.
£31.27
£45.00 (31% Off)
3
27% Off

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

USN
27% Off

USN I Diet Fuel Ultralean Meal Replacement Shake (Strawberry, 1kg - 18 Servings/Meals) High Protein, Low Calorie Drink to Support Weight Loss & Balanced Diet I Added 24 Vitamins & Minerals

USN

£19.00

£26.00
(27% Off)

More Details
Main highlights
- YOUR NEW MORNING ROUTINE: Get your day off to the best possible start with these fantastic, and delicious, USN Meal Replacement Shakes. You don’t need to go without breakfast to help you lose weight - one quick shake and you are ready to take on the day!
- USN HIGH PROTEIN SHAKE POWDER: Use Diet Fuel Meal Replacement Shakes to help you reach your weight-loss goals. Perfect support for a low-calorie diet - a quick & easy way to get what your body needs, without the calories. Packed with 24 Vitamins & Minerals.
- ULTIMATE SPORTS NUTRITION: USN are at the forefront of sports nutrition research, making effective sports nutrition supplements for professional and non-professional athletes, pre or post workout. Science-driven nutrition so we can achieve together.
- HIGH PROTEIN MEAL REPLACEMENT: Protein is absolutely vital if you are looking to lose weight. When we take protein on board, it triggers our satiety hormones, which make us feel full. USN meal replacement shakes have 25g of protein per serving.
- FEEL FULL FOR LONGER: USN’s meal replacement powder has been specially formulated by a dedicated team to ensure you feel full for longer, reducing the need to snack or over-eat and supporting a reduced calorie diet - to help you reach your weight goals.
£19.00
£26.00 (27% Off)
4
Best Value
34% Off

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

USN
34% Off

USN I Diet Fuel Ultralean Meal Replacement Shake (Strawberry, 1kg - 18 Servings/Meals) High Protein, Low Calorie Drink to Support Weight Loss & Balanced Diet I Added 24 Vitamins & Minerals

USN

£17.10

£26.00
(34% Off)

More Details
Main highlights
- YOUR NEW MORNING ROUTINE: Get your day off to the best possible start with these fantastic, and delicious, USN Meal Replacement Shakes. You don’t need to go without breakfast to help you lose weight - one quick shake and you are ready to take on the day!
- USN HIGH PROTEIN SHAKE POWDER: Use Diet Fuel Meal Replacement Shakes to help you reach your weight-loss goals. Perfect support for a low-calorie diet - a quick & easy way to get what your body needs, without the calories. Packed with 24 Vitamins & Minerals.
- ULTIMATE SPORTS NUTRITION: USN are at the forefront of sports nutrition research, making effective sports nutrition supplements for professional and non-professional athletes, pre or post workout. Science-driven nutrition so we can achieve together.
- HIGH PROTEIN MEAL REPLACEMENT: Protein is absolutely vital if you are looking to lose weight. When we take protein on board, it triggers our satiety hormones, which make us feel full. USN meal replacement shakes have 25g of protein per serving.
- FEEL FULL FOR LONGER: USN’s meal replacement powder has been specially formulated by a dedicated team to ensure you feel full for longer, reducing the need to snack or over-eat and supporting a reduced calorie diet - to help you reach your weight goals.
£17.10
£26.00 (34% Off)
5
27% Off

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

SlimFast
27% Off

SlimFast Meal Replacement Shake Weight Loss & Balanced Diet, Vitamins and Minerals, Low Calorie, High Protein, Strawberry Flavour, 16 servings, 584 g, Packaging May Vary

SlimFast

£8.00

£11.00
(27% Off)

More Details
Main highlights
- Substituting two main daily meals with meal replacements contributes to weight loss, and substituting one contributes to weight maintenance. Source: COMMISSION REGULATION (EU) No 432/2012 of 16 May 2012
- SATISFY HUNGER: Enjoy two SlimFast diet shakes or healthy snacks (bars) a day as part of our 3.2.1 plan to help you lose weight and keep it off, or enjoy it as part of your balanced diet
- NEVER RUN ON EMPTY: SlimFast Balanced High Protein Meal Replacement Powder supports your weight loss and helps to keep it off, with 14g of protein, no added sugar, and less than 230 kcal per serving
- MULTIVITAMIN AND MINERAL POWERHOUSE: 23 vitamins and minerals (incl. Vitamin A, Vitamin D, Vitamin C, Vitamin B6, Vitamin B12, magnesium and zinc) to support your immunity and keep your metabolism humming
- IRRESISTIBLE FLAVOURS: Our meal replacement shakes for weight loss come in various delish flavours, making your weight loss journey tasty and enjoyable
£8.00
£11.00 (27% Off)

5 Best Diet Shakes of 2026

USN I Diet Fuel Ultralean Meal Replacement Shake (Strawberry, 2kg - 36 Servings/Meals) High Protein, Low Calorie Drink to Support Weight Loss & Balanced Diet I Added 24 Vitamins & Minerals

USN I Diet Fuel Ultralean Meal Replacement Shake (Strawberry, 2kg - 36 Servings/Meals) High Protein, Low Calorie Drink to Support Weight Loss & Balanced Diet I Added 24 Vitamins & Minerals

USN I Diet Fuel Ultralean Meal Replacement Shake (Strawberry, 1kg - 18 Servings/Meals) High Protein, Low Calorie Drink to Support Weight Loss & Balanced Diet I Added 24 Vitamins & Minerals

USN I Diet Fuel Ultralean Meal Replacement Shake (Strawberry, 1kg - 18 Servings/Meals) High Protein, Low Calorie Drink to Support Weight Loss & Balanced Diet I Added 24 Vitamins & Minerals

SlimFast Meal Replacement Shake Weight Loss & Balanced Diet, Vitamins and Minerals, Low Calorie, High Protein, Strawberry Flavour, 16 servings, 584 g, Packaging May Vary

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Powder Tin Raspberry and White Chocolate

Powder Tin Raspberry and White Chocolate

SlimFast Ready To Drink Shake, Meal Replacement Shakes for Weight Loss and Balanced Diet, High Protein, Vitamins and Minerals, No Added Sugar, Raspberry and White Chocolate Flavour, 6 x 325 ml

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