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SiS Advanced Isolate+ Protein Powder - 1kg

27% Off
Was £33.00 Was £45.00

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gluten free
wheat free
nut free
Delivery Details

UK Delivery Information*

  • Free Standard Delivery over £30
  • Standard UK Delivery (3-5 Working Days) - £3.99
  • UK Next Day Delivery (Restrictions Apply) - £4.99
  • SiS Premier - Unlimited Next Day Delivery for 1 Year - £9.99
Full Details & International Delivery



Product Information

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.

Key Features

  • • Contains 32 grams of rapidly digestible whey protein isolate per serving
  • • High amount of protein without additional calories
  • • 9g of BCAAs and 5g of Leucine per serving

Product Uses
Recommended Usage

Add 40g (4 scoops) of Advanced Isolate + to 250ml of water in a shaker. Consume post training or between meals to boost protein intake. Shake well ensuring the lid is firmly closed.


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).

Informed Sport Registered:

Our complete product range is developed using a world-class approach to banned substance testing, providing assurance for athletes. For more information on Informed Sport & our unique world class approach, click here.

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


Advanced Isolate - Strawberry

Advanced Isolate - Mint Chocolate

Advanced Isolate - Chocolate Orange

Nutritional Info

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).

Read More

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.


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Verified Reviews

Rated 4.5 out of 5 based on 15 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

Miquel Tomas

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

Lynda Chase

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


Love this flavour, great for daily maintenance.

Iván Larrea Durango

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

Clement Pichon

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


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

Morag MacLennan

Great product! Tastes good, mixes well!

Michael Pearce

Fantastic product, great taste too.

Miquel Tomas

Great product if looking for high protein powder.


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

Dennis Nelder

Great deal and a new flavour to try...