Growth Matrix
by Reflex Nutrition
A trusted everyday protein: affordable, versatile, and designed to support your training goals with every shake.
- Up to 20g protein per serving
- For shakes, smoothies, baking and more
FlavourChocolate
Size1.89kg
Best price today
In stock£39.99
£2.12 / 100g
You save £2.00vs highest tracked price today
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 36g serving
55g protein
19.8g per 36g serving
25g carbohydrates
9g per 36g serving
6g fat
2.2g per 36g serving - moderate fat
380 kcal
137 kcal per 36g serving
View full nutritional information
| Nutrient | Per 100g | Per serving (36g) |
|---|---|---|
| Protein | 55g | 19.8g |
| Calories | 380 kcal | 137 kcal |
| Carbohydrates | 25g | 9g |
| Fat | 6g | 2.2g |
Know when to buy
Price history
Lowest price on record, any flavour or size
£2.12/100g (£39.98 for 1.89kg on 30 Sept 2026)
1.89kg · all flavours · price per pack
- Amazon UKlatest £39.99, lowest £39.98, highest £41.99 in the last 90 days
Quick answers
Is this right for you?
Who is it for?
Reflex Nutrition Growth Matrix 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 55g of protein per 100g (around 20g per 36g serving), Reflex Nutrition Growth Matrix sits in a competitive position for a whey concentrate product.
What else do you need to know?
Reflex Nutrition Growth Matrix is a whey concentrate protein powder made by Reflex Nutrition. It comes in 1.89kg 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 Reflex Nutrition Growth Matrix in the UK?
The best price we have verified today is £2.12 per 100g for the 1.89kg bag, checked 3 Nov 2026. Use the buy button above to go straight to it.
How much protein does Growth Matrix contain per 100g?
Growth Matrix contains 55g of protein per 100g, with 19.8g per 36g serving. It is a whey concentrate product.
Is Reflex Nutrition Growth Matrix currently in stock?
At the last check, 2 out of 2 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
1.89kg · 2 offers for this selection · sorted by cost per 100g
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