Advanced Isolate+ Protein Powder - 1kg

Perfect for:
Gluten Free
Nut Free
Wheat Free

Out of stock
FREE UK Delivery over £40 Deliveries and Returns
Key Benefits
Supports recovery and muscle rebuild
32g of protein, 5g leucine
High protein, low calories
Key Benefits
Supports recovery and muscle rebuild
32g of protein, 5g leucine
High protein, low calories
Product Overview

Why Choose?

  • High quality blend of whey protein isolate with added leucine
  • 146 calories per serving
  • Designed for use between meals to support lean muscle mass or immediately after strength and conditioning session


About Advanced Isolate+ Protein Powder

Advanced Isolate + contains 100% pure whey protein isolate with added leucine. This low carbohydrate and low fat protein shake contains 5g of leucine and 9g of branched chain amino acids (BCAAs) to stimulate and support the growth of lean muscle mass to maximise training gains. Each serving contains 32g of protein with only 2.7g of carbohydrate and 0.9g of fat.

Suggested Use

Whey protein isolate has one of the highest-known protein digestion rates, and has a high BCAA content. BCAAs make up 35% of lean muscle mass; therefore they are an essential element to include in your diet when building lean muscle is the training focus.

Additional leucine has been included as it is an amino acid which serves not only as a building block for new muscle protein, but also increases the rate of muscle protein synthesis (muscle rebuild).

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Suitable For: Vegetarians, Gluten Free, Wheat Free, Nut Free


Advanced Isolate - Strawberry

Advanced Isolate - Mint Chocolate

Directions For Use
  • SiS Advanced Isolate+ can be consumed with or between meals to hit the recommended protein intake of 20-15g every 3-4 hours.
  • Consume immediately post exercise, particularly after strength and conditioning sessions.

  • Add 40g (4 scoops) of Advanced Isolate + to 250ml of water in a shaker.
  • Shake well ensuring the lid is firmly closed.
Nutritional Information
Suitable For
Nutrition Stats

For nutritional information about the individual flavours please contact customer service. Example below is for Chocolate Orange flavour.

Typical ValuesPer 100gPer Serving 40g

Energy 1550kj/366kcal 620kj/146kcal
Protein 80g 32g
Carbohydrates 6.6g 2.7g
of which sugars 2.3g 0.9g
Fat 2.4g 0.9g
of which saturates 0.8g 0.3g
Salt 0.54g 0.22g


Whey Protein Isolate (Milk), L-Leucine, Thickener (Xanthan Gum), Natural Flavouring, Emulsifier (Soy Lecithin), Colour (Beetroot Red), Sweetener (Sucralose).


What is the difference between this and SiS Whey Protein?

SiS Advanced Isolate+ has one of the highest known digestion rates and a higher BCAA content. The addition of 9g of BCAA's and 5g leucine help stimulate and support the growth of lean muscle mass. SiS Advanced Isolate+ is more purified, providing a higher protein content (31g) and lower levels of carbohydrate and fat.


When should I have this versus SiS Whey Protein and SiS REGO Rapid Recovery?

SiS Advanced Isolate+ can be consumed with or between meals to hit the recommended protein intake of 20-15g every 3-4 hours. Consume immediately post exercise, particularly after strength and conditioning sessions. This is ideal for individuals looking for minimal carbohydrate and fat intake, while maintaining and building lean muscle mass.


Why is it more expensive than SiS Whey Protein?

Whey protein isolate is digested and absorbed quicker than whey concentrate. SiS Advanced Isolate+ is a purified version of whey concentrate with additional leucine, which increases protein content with minimal carbohydrate and fat.


How many scoops per serving?

Add approximately 4 scoops to 250ml of water and mix well.


How much protein is there per serving?

SiS Advanced Isolate+ contains 33g of protein per serving.


Reviews (32 Reviews)
Showing 32 of 32 reviews

Best isolate whey protein with high content protein that I have ever used for building lean muscles. I'm normally lactose intolerant and this is perfect for me. G



Great taste and mix. Added it to my morning cereal and is an absolute game changer.

Miquel Tomas


As a vegan I’m always looking for easy good quality protein an this does the job.

Lynda Chase


Love this flavour, great for daily maintenance.



Works well for me. Does the job. Happy customer.

leandro silva


Great taste and helps maintain protein intake with low calories



Didn’t receive product as my order was cancelled 24hrs after order placed and payment taken as they had run out of stock. Got an automatically generated email a day later. No alternatives put forward or estimate for when back in stock provided, which would have been nice and shown some customer care. The refund was applied quickly though so grateful for that. Would have thought that modern inventory management was such that items out of stock wouldn’t be offered for sale on the website. For what it’s worth, I have used their vanilla whey protein previously and found it to be a good product.

Paul Fell


Good and light taste

Mohammed Alsamahiji


Feeds me guns

Amy Jones


Great product. The isolate is much easier on the stomach due to its low lactose content.

Lisa Nicholas


Excellent product for intense training, dies what it says ....

susan ingman


was hoping it might be ok for someone with IBS/lactose sensitivity. Not really suitable I'm afraid. Shame SIS don't do smaller pack sizes or samples to test beforehand, these packs are not cheap

Robert Dewar


Does the job.

leandro silva


Texture is a lot thicker than Whey protein and a bit slimy but drinkable. Think chocolate would be better than strawberry.



excelente producto, satisface mis expectativas para lograr mis metas en el fitness.

Iván Larrea Durango


Très bon en goût et facile à assimilé pour l'organisme d'un cycliste

Clement Pichon


Not keen on the gelatine texture, but flavour is ok !



Great product! Tastes good, mixes well!

Morag MacLennan


Fantastic product, great taste too.

Michael Pearce


Good taste - easy to mix



Not as minty as I expected, but still nice taste

Mr Colman



Enrico Vano


Great taste



Best-tasting protein powder I’ve had, plus low in calories and fat. Highly recommended.

James Glossop


I wasnt super happy with the flavor, but definitely will try again a different one

Miss. Stella Psarra


Tastes great and really easy to mix and drink - plus its 31g of protein per serving - definitely recommend.

Gareth Smyth


Great product if looking for high protein powder.

Miquel Tomas


You need to weigh the doses and not rely on the scoop measure as you will never get the advertised number of doses out of it and will be wasting powder as you can only absorb so much in one serving...



Tastes really bad cant drink without throwing it back up



Great deal and a new flavour to try...

Dennis Nelder