PhD Nutrition Diet Whey 1kg – High Protein, Low Calorie Diet Shake
PhD Nutrition Diet Whey is the UK’s best-selling diet protein powder, trusted by athletes and everyday gym-goers looking to stay lean while maintaining muscle mass. With 20g of premium protein per serving, less than 125 calories, and under 3g of sugar, it’s the ultimate whey protein shake for fat loss and lean definition.
Formulated with a unique blend of CLA, L-Carnitine, green tea extract, and flaxseed, Diet Whey not only supports muscle maintenance during a calorie deficit but also helps boost metabolism, energy, and satiety.
Whether you’re cutting, dieting, or simply looking for a delicious low-calorie protein shake, Diet Whey delivers smooth texture, incredible flavour, and scientifically backed results.
Who is PhD Diet Whey For?
- Individuals in a calorie deficit wanting to stay lean
- Athletes and gym-goers who want to maintain muscle mass while losing fat
- Anyone looking for a low-calorie, filling protein shake
- Perfect for use as a healthy snack, post-workout shake, or meal support
Why Choose PhD Nutrition Diet Whey?
Unlike standard whey protein powders, Diet Whey is tailored for fat loss and muscle definition. Each serving combines high-quality protein with active fat-burning ingredients, keeping you fuller for longer while supporting energy and metabolism.
✔ Green Tea Extract – rich in antioxidants to support fat loss
✔ CLA (Conjugated Linoleic Acid) – supports lean body composition
✔ L-Carnitine – helps convert fat into energy
✔ Flaxseed – source of fibre and healthy fats for fullness
With Informed Protein Certification, you know you’re getting accurate protein content and premium quality in every scoop.
Product Highlights
- Low-calorie, high-protein diet shake
- Includes fat-loss support ingredients (CLA, L-Carnitine, green tea, flaxseed)
- Less than 3g sugar per serving
- Informed Protein Certified – tested for accuracy
- Delicious taste, smooth texture, easy mixing
- Vegetarian-friendly
PhD Nutrition Diet Whey 1kg is more than just a protein shake – it’s your ultimate partner for fat loss, lean muscle maintenance, and diet success.





Gary –
Great protein powder, definitely helped me loads feel learner and lost weight. Fast delivery very happy great price as well.
Chloe W –
Love this shake! Perfect for keeping me full after workouts. The chocolate flavour is spot on and delivery was super quick.
Sarah J –
Tastes amazing and mixes so easily. I’ve noticed my stomach feels leaner after a few weeks. Arrived next day!
Emma T –
Great for breakfast or after the gym. Keeps me satisfied for hours. Vanilla crème is my favourite. Fast service from MPS.