Diet Whey Protein
by Bulk
A trusted everyday protein: affordable, versatile, and designed to support your training goals with every shake.
- Up to 17g protein per serving
- Low fat - under 3g per 100g
- For shakes, smoothies, baking and more
Flavour pictures illustrate the taste, not the powder's colour or ingredients.
Best price
In stock£15.99
£3.20 / 100g
Secure retailer checkout
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Transparent protein profile
What's inside
Values per 100g, with the amount in one 25g serving
68g protein
17g per 25g serving - solid protein content
12g carbohydrates
2.9g per 25g serving
2g fat
0.6g per 25g serving - very lean
360 kcal
90 kcal per 25g serving
View full nutritional information
| Nutrient | Per 100g | Per serving (25g) |
|---|---|---|
| Protein | 68g | 17g |
| Calories | 360 kcal | 90 kcal |
| Carbohydrates | 11.6g | 2.9g |
| Fat | 2.4g | 0.6g |
Know when to buy
Price history
Lowest price on record, any flavour or size
£3.20/100g (£15.99 for 500g on 5 Oct 2026)
500g · all flavours · price per pack
- Bulklatest £15.99, lowest £15.99, highest £21.99 in the last 90 days
- Amazon UKlatest £20.99, lowest £15.99, highest £20.99 in the last 90 days
Quick answers
Is this right for you?
Who is it for?
Bulk Diet Whey Protein is designed for gym-goers and strength trainers looking for an affordable, everyday protein source. Whey concentrate suits anyone who wants a solid protein boost without paying a premium for ultra-high purity. It works well as a post-workout shake or a between-meals top-up.
What can you expect?
A well-rounded protein powder that mixes easily and tastes good. Whey concentrate typically delivers 70-80% protein content with a natural, creamy texture. You will get a reliable source of all essential amino acids including BCAAs to support muscle recovery after training. With 68g of protein per 100g (around 17g per 25g serving), Bulk Diet Whey Protein sits in a solid mid-range for a whey concentrate product.
What else do you need to know?
Bulk Diet Whey Protein is a whey concentrate protein powder made by Bulk. It comes in 500g, 1kg sizes, and WheyWise tracks prices across 2 UK retailers so you can always find the best deal. Every price on WheyWise is read from the retailer’s own page and re-checked daily and sorted by cost per 100g, so you can see both the cheapest option and how current it is. All links to Amazon and retailer sites are affiliate links - this is how WheyWise stays free.
Frequently asked questions
Where is the cheapest place to buy Bulk Diet Whey Protein in the UK?
We refresh Bulk Diet Whey Protein pricing daily from Amazon UK and show the fetch time next to every figure. If no verified price is showing above, we do not currently hold one we would stand behind, and the buy button will take you to the live listing to check.
How much protein does Diet Whey Protein contain per 100g?
Diet Whey Protein contains 68g of protein per 100g, with 17g per 25g serving. It is a whey concentrate product.
Is Bulk Diet Whey Protein currently in stock?
At the last check, 7 out of 7 tracked variants were in stock. Stock status carries the same fetch time as the price shown above, so check the retailer listing before ordering.
Pick your pack
2 sizes · Vanilla · cost per 100g for each
The 500g works out at £3.20 per 100g. The 1kg costs £3.50. Same powder, 1.1x the price per gram.
Where to buy in the UK
Vanilla · 500g · 2 offers for this selection · sorted by cost per 100g
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