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SiS Whey Protein Tub - 1kg

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Was £0.00 Was £30.00

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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

Whey Protein contains a blend of high quality whey protein isolate and concentrate, providing a source of rapidly digesting protein.

A high amino acid profile which supports lean muscle growth and maintenance, with at least 5g of BCAAs per serving, including 2.4-2.5g of leucine which increases the rate of muscle protein synthesis. Each serving contains 22-23g of protein, depending on the flavour you choose.

Key Features

  • • Contributes to the maintenance and growth of lean muscle mass
  • • Fueling gold medal winners since 1992
  • • 22-23 grams of protein
  • • Contents: 33 servings with scoop included.

Product Uses
Recommended Usage

Our Whey Protein can be used with or between meals to support lean muscle mass or immediately after strength and conditioning sessions, with the goal of ingesting 20-25g of protein every 3-4 hours.

Directions for Use

Add 30g of Whey Protein Powder using the scoop provided (each scoop holds 10g, so 30g is 3 scoops) to 250ml of water in a shaker. Shake well ensuring the lid is firmly closed.


SiS Whey Protein is a great tasting, convenient way to increase daily protein intake. It is recommended that 1.4-1.6 grams of protein per kg of body weight is consumed each day in order to promote lean muscle mass. For a 75kg male who trains regularly that would equate to 120g of protein per day.

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

Nutritional Info

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

Typical ValuesPer 100gPer Serving 30g
of which saturates4.3g1.3g
of which sugars2.9g0.9g


Protein Blend (90%) (Whey Protein Concentrate (Milk), Whey Protein Isolate (Milk)), Thickener (Xanthan Gum), Natural Flavourings, Emulsifier (Soy Lecithin), Sweetener (Sucralose), Fat Reduced Cocoa Powder, Natural Flavourings


Whey Protein - Chocolate

Whey Protein - Pineapple & Coconut

Whey Protein - Strawberry

Whey Protein - Vanilla

Read More

How does this differ from REGO?

SiS Whey Protein is lower in carbohydrate than REGO, promoting muscle rebuild and reduction in muscle soreness post exercise.


When should I take this?

SiS Whey Protein can be used with or between meals to support lean muscle mass or immediately after strength and conditioning sessions, with the goal of ingesting 20-25g of protein every 3-4 hours.


Do I mix with water or milk?

Although milk is high in protein, it's also high in carbohydrate and is made up of 80% casein, which is slow digesting. Mix with water to increase absorption rates, which is ideal for use post exercise.


How much protein is there per serving?

There is 23g of protein per 30g serving.


Does whey protein contain creatine?

No, SiS whey protein does not contain added creatine.


How many scoops with the included scoop per serving?

Add 3 scoops (30g) to 250ml of water in an SiS protein shaker.


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Verified Reviews

Rated 4.6 out of 5 based on 49 Reviews
Phil Simpson

Mixes really well and tastes great

Matt Guilder

Great taste Notice the benefits from the product


Great product no chumps mixes well

Meg Haver

Great flavour and good texture.

Mr. Joe Beer

Easy to mix. Great flavours and good value for money.

Phil Simpson

Mixes really well and taste great


Flavor is ok and protein powder mixes well with milk no clumps


Good product goes down well and no chumps

Meg Haver

Tastes great and does the job!

Miss Gail Fonseca

My husband used this and is happy with the texture and flavour. Would be good if there was a 2kg size.

Ely Raeds

Expected more from the strawberry taste, I know I should stick with them bananas.

Tim Staton

Its a great product, but the problem is it does not taste like the other strawberry products they sell (e.g like Rego)

Orlando Almeida

Very nice flavour and tasty

Jamie Calver

the last km of every ride, whether its training or a race, I always look forward to my protein. Great product.


tastes great. the powder is fiine and mixes quickly


Very thick, difficult to mix with milk as alternative to water. Nice taste


Ottimo gusto e provato sia come snack che come post allenamento breve. Molto bene.


Best flavor I mix it with oatmeal breakfast

Gellert Vinnai

I recommend the vanilla falvour to anyone as it can be perfectly mixed into any fruit smoothies. At least this is how I like to consume it.


A good way to get fuel in, before or after exercise

phil lang

Not a bad taste good value. Using in in cooking higher protein foods and seems to work ok

Andrew Nimmo

Seems fine, not to strong tasting. Wasn't supplied with a measuring scoop though.

Stuart Craig

Tastes great. Works really well in breakfast smoothies or as a recovery drink with semi-skimmed milk.

Mark Cox

Seems a good quality whey powder, just remember to keep training!

Dave Morgan

Easy to make up with good taste and no bad after effects on the stomach

Stuart Green

My daily diet before and after exercise

Ed Maxim

really good flavor, easily dissolved in the shaker & not difficult to drink with none of that 'chalky' after taste

Martin Phillips

Great protein source with a great taste

Diego Civitella

Prodotto ottimo, di facile solubilità, buon sapore ma soprattutto facilmente digeribile.


Very good taste. It would be great to have it also in bag, to reduce scraps

Elise Kamanda

Love this product works a treat


Proteine di ottima qualità!!! Nessun problema digestivo è buonissima solubilità!

Five aday

Recommended by a friend, great taste and has helped my results in the gym.


This is my favourite product that I always return back to, never get tired of this chocolate and has helped me put on muscle continually.

Michelle O’Neill

Tastes lovely and I did feel less aching the next morning after taking it after my training

Colin Woods

Really good product, definitely reduces the amount I ache the next morning after a gym session.

Meg Haver

Great flavour and mixes easily.


Does the job, 250mls water seems a little light as there’s always a bit left in the shaker.

Mr. Joe Beer

High quality protein, easy to mix and great taste

Cristiano Parzani

Easy to prepare. The taste could improve.

Meg Haver

Great texture and ideal for my nutrition plan

Caroline Old

Does what it is meant to and tastes good.

Craig Morrison

More easily digested than the recovery powder. Good taste . I use it in the evening as an additional protein / recovery boost.

Ian Carnegie

Very tasty! Easily mixed as well.

Paul Cheetham

Good Taste, just what the body needs to rebuild

Richard Fantom

Pleasant enough to drink.

Stephen Simpson

Good Whey powder but not the nicest taste. I find the likes of Maxinutrition tastes better but everyone's taste is different. It mixes well and sits well in your stomach.

Fiona Chinn

My son reckons this is the best....wouldn't mind SIS sponsoring him as he uses so much!