Source 7 Protein
by Rule 1 Proteins
A trusted everyday protein: affordable, versatile, and designed to support your training goals with every shake.
- Up to 23g protein per serving
- For shakes, smoothies, baking and more
FlavourPumpkin Spice
Size897g
Best price today
In stock£32.11
£3.54 / 100g
Secure retailer checkout
We may earn a commission at no extra cost to you. Affiliate disclosure
Transparent protein profile
What's inside
Values per 100g, with the amount in one 30g serving
75g protein
22.5g per 30g serving - solid protein content
8g carbohydrates
2.4g per 30g serving - low carb
6g fat
1.8g per 30g serving - moderate fat
378 kcal
113 kcal per 30g serving
View full nutritional information
| Nutrient | Per 100g | Per serving (30g) |
|---|---|---|
| Protein | 75g | 22.5g |
| Calories | 378 kcal | 113 kcal |
| Carbohydrates | 8g | 2.4g |
| Fat | 6g | 1.8g |
Know when to buy
Price history
Lowest price on record, any flavour or size
£3.41/100g (£30.92 for 907g on 17 Sept 2026)
897g · all flavours · price per pack
- Amazon UKlatest £32.11, lowest £30.92, highest £37.50 in the last 90 days
Quick answers
Is this right for you?
Who is it for?
Rule 1 Proteins Source 7 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 75g of protein per 100g (around 23g per 30g serving), Rule 1 Proteins Source 7 Protein sits in a solid mid-range for a whey concentrate product.
What else do you need to know?
Rule 1 Proteins Source 7 Protein is a whey concentrate protein powder made by Rule 1 Proteins. It comes in 897g sizes. 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 Rule 1 Proteins Source 7 Protein in the UK?
The best price we have verified today is £3.54 per 100g for the 907g bag, checked 1 Oct 2026. Use the buy button above to go straight to it.
How much protein does Source 7 Protein contain per 100g?
Source 7 Protein contains 75g of protein per 100g, with 22.5g per 30g serving. It is a whey concentrate product.
Is Rule 1 Proteins Source 7 Protein currently in stock?
At the last check, 4 out of 4 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
1 size · any flavour · cost per 100g for each
Where to buy in the UK
897g · 4 offers for this selection · sorted by cost per 100g
Similar products you might prefer
Other whey concentrate powders from different brands, cheapest per 100g first.
Omnia
Pure Whey Protein Powder
XL Nutrition
XTRA Whey
PBN
Premium Body Nutrition Whey Protein