Get 20% off all protein powders with Unidays

Diet Protein

30 items

Sort by: Popular

Image 1 for Diet Protein Vanilla Ice Cream 450g (18 Servings)

Image 2 for Diet Protein Vanilla Ice Cream 450g (18 Servings)

Image 3 for Diet Protein Vanilla Ice Cream 450g (18 Servings)

Image 4 for Diet Protein Vanilla Ice Cream 450g (18 Servings)

Applied Nutrition

Diet Protein Vanilla Ice Cream 450g (18 Servings)

(122)

20% Off

£12.00

RRP: £15.00

£2.67/100 g

Precision Engineered

Lean Protein Vanilla 650g

Short Dated August 2025

Image 1 for Diet Protein Strawberry Milkshake 450g (18 Servings)

Image 2 for Diet Protein Strawberry Milkshake 450g (18 Servings)

Image 3 for Diet Protein Strawberry Milkshake 450g (18 Servings)

Applied Nutrition

Diet Protein Strawberry Milkshake 450g (18 Servings)

Image 3 for Diet Protein Chocolate Dessert 450g (18 Servings)

Applied Nutrition

Diet Protein Chocolate Dessert 450g (18 Servings)

Diet Whey Protein Powder Belgian Chocolate 600g

Diet Whey Protein Powder Vanilla Crème 600g

(330)

£18.00

£3.00/100 g

Image 1 for Diet Fuel Meal Replacement Shake Vanilla 1kg

Image 2 for Diet Fuel Meal Replacement Shake Vanilla 1kg

Image 3 for Diet Fuel Meal Replacement Shake Vanilla 1kg

18+

USN

Diet Fuel Meal Replacement Shake Vanilla 1kg

Image 3 for Diet Protein Salted Caramel 450g (18 Servings)

Applied Nutrition

Diet Protein Salted Caramel 450g (18 Servings)

Image 3 for Diet Whey Protein Strawberry Milkshake 1kg

Applied Nutrition

Diet Whey Protein Strawberry Milkshake 1kg

Sold byAPPLIED NUTRITION PLC

£33.00

£3.30/100 g

New In

Image 1 for Impact Diet Whey Chocolate 1kg

Image 2 for Impact Diet Whey Chocolate 1kg

Image 3 for Impact Diet Whey Chocolate 1kg

Myprotein

Impact Diet Whey Chocolate 1kg

(28)

£26.00

£2.60/100 g

Precision Engineered

Lean Protein Chocolate 650g

Image 3 for Diet Fuel Meal Replacement Shake Strawberry 1kg

Image 4 for Diet Fuel Meal Replacement Shake Strawberry 1kg

Image 5 for Diet Fuel Meal Replacement Shake Strawberry 1kg

18+

USN

Diet Fuel Meal Replacement Shake Strawberry 1kg

Diet Fuel Meal Replacement Shake Chocolate 2kg

Diet Fuel Meal Replacement Shake Strawberry 2kg

Image 3 for Lean Protein Strawberry 650g

Image 4 for Lean Protein Strawberry 650g

Precision Engineered

Lean Protein Strawberry 650g

Diet Fuel Meal Replacement Shake Vanilla 2kg

Diet Plant Protein Powder Strawberries & Cream 500g

(16)

£18.00

£3.60/100 g

Image 1 for Diet Whey Protein Vanilla Ice Cream 1Kg

Image 2 for Diet Whey Protein Vanilla Ice Cream 1Kg

Image 3 for Diet Whey Protein Vanilla Ice Cream 1Kg

Applied Nutrition

Diet Whey Protein Vanilla Ice Cream 1Kg

Sold byAPPLIED NUTRITION PLC

£33.00

£3.30/100 g

New In

Image 1 for Diet Whey Protein Chocolate Dessert 1kg

Image 2 for Diet Whey Protein Chocolate Dessert 1kg

Image 3 for Diet Whey Protein Chocolate Dessert 1kg

Applied Nutrition

Diet Whey Protein Chocolate Dessert 1kg

Sold byAPPLIED NUTRITION PLC

Diet Whey Protein Powder Mango 600g

(24)

£18.00

£3.00/100 g

1 - 20 of 30 products

Shop Diet Protein at Holland & Barrett

Looking to build and maintain lean muscle mass while supporting your overall health and fitness goals? Diet protein powders are the perfect solution - a game-changer for those who want to take their fitness journey to the next level.

For those following a calorie-controlled diet or wanting to lose a few pounds, the low calorie and low sugar content of lean protein powders means they fit perfectly into a balanced diet and fitness routine. Helping to keep you feeling full, diet protein powders are a great way to help you curb those pesky cravings and keep you feeling satisfied throughout the day.

Our lean protein powders are designed to deliver a complete amino acid profile, essential for muscle recovery and growth. This means they work hard to replenish nutrients and reduce muscle soreness after a workout, so you can bounce back faster and stronger.

At Holland & Barrett, we stock a treasure trove of lean protein powders that are carefully formulated to provide maximum protein content with minimal fat and carbs. From diet whey and casein to plant-based proteins like pea, hemp, and brown rice, we've got you covered.

Whether you're an athlete, fitness enthusiast, or simply someone looking to improve your overall well-being, our range of low calorie protein powders has something for everyone. With a variety of flavours and formulations to suit your preferences and dietary needs, you'll find the perfect fit for your journey.

FAQs

Is diet protein good for weight loss?

There is a lot of information out there about protein shakes and weight loss – Holly Roper, our in-house registered nutritionist says: “Protein powders may help you lose weight when used alongside a consistent exercise regime. Consuming protein, in the form of wholefood sources or in a protein shake, helps us feel fuller for longer which may contribute to a reduction in unwanted cravings or snacking. If your goal is weight loss, then it’s recommended you opt for a low-calorie protein powder, and don’t forget to read the recommended serving size, as this can often change depending on the type of protein powder.”

Can diet whey be used as a meal replacement?

Wondering if you can use diet whey as a meal replacement? Our in-house registered nutritionist, Holly Roper, says: “Diet whey can be used as a meal replacement. It is recommended to be used alongside a balanced diet, and you should only replace one or two of your daily meals over a short period of time. This is because, if used too much, you may put yourself at risk of missing out on all-important macro and micronutrients, as well as fibre.”

What is lean protein?

Lean protein is a type of protein that contains minimal amounts of fat and is low in calories. It typically comes from sources such as poultry, fish, lean cuts of meat, eggs, low-fat dairy products, legumes, and tofu, but you can also find it in the form of protein powders. Lean protein is the best choice for those who are looking to maintain or build their muscle mass or manage their weight.

What does diet protein powder do?

Diet protein powder supplements can help support weight loss efforts by providing a convenient and low-calorie source of protein. They promote feelings of fullness, preserve lean muscle mass, and aid in post-exercise recovery, all of which are beneficial for weight management.