Night & Day Protein combo

£93.97 £39.99

Instant Whey™ PRO - 900g


Micellar Casein - 909g


Reflex Stainless Steel 750ml Shaker

In stock

What is Instant Whey™ PRO?

Instant Whey™ PRO is our market leading high protein powder, with an 80% protein level and has been for close to two decades.

It tastes just like a milkshake, and by using our new flavour technology, we’ve created our best tasting version yet. In fact, we’d argue that it’s the best whey product you can buy. It also delivers more protein and extras, such as friendly bacteria and digestive enzymes, than nearly all of our competitors.

What is Micellar Casein?

Micellar Casein is a slow release protein shake made with protein concentrate from EU sourced milk, produced by grass-fed cattle.

Casein protein can take up to six hours to completely digest and be utilised, making Micellar Casein the perfect protein product to help deliver your muscles enough protein for an extended period of time.

Micellar Casein now comes in an improved range of flavours, without resorting to adding sugars, corn syrups or creamers. Our Micellar Casein provides a product that mixes easily in a shaker and delivers a delicious shake.

Who is this protein combo for?

Both products are suitable for both men and women aiming to build and maintain muscle mass or anyone who undertakes regular sport and cardio training can benefit from using Instant Whey™ PRO. Thousands of athletes have praised this product for over 15 years, relied on it year-round, and enjoyed the guaranteed quality delivered in to every single tub.

Instant Whey™ Pro and Micellar Casein are vegetarian products, however, they are not suitable for vegans or coeliacs.

What are the benefits?

Instant Whey™ PRO

  • Guaranteed levels of protein
  • Free from added soy protein, sugars and palm oil
  • Amazing flavours and milkshake texture

Micellar Casein

  • Slow release to balance protein levels over a period of up to 6 hours
  • Top quality protein with no added soy, sugars or creamers
  • Contributes to growth and maintenance of muscle mass

Slow-release casein protein drip feeds the body amino acids, delivering an immediate hit as well as sustained protein absorption.

Recommended Usage of the Protein Combo

Instant Whey™ PRO

Consume 2-3 servings daily, ideally post-workout.

Mix 25g, which is approximately two level 25ml measures (there is a scoop included in the tub), with 175-225ml water or skimmed milk in a shaker or blender. These are, however, guidelines. More or less liquid can be added to taste.

Once mixed, consume immediately. For exact measurements, we advise using weighing scales, as the scoop measures in millilitres rather than grams.

Micellar Casein

Consume one serving daily, ideally before bedtime. Alternatively, take Micellar Casein during the day when no food will be eaten for at least three hours.

Mix 33g, which is approximately three heaped 25ml measures (there is a scoop included in the tub), with 400ml water or skimmed milk in a shaker or blender. These are guidelines, and for a creamier or thicker shake, simply add more or less liquid to taste.

Once mixed, consume immediately. For exact measurements, we advise using weighing scales, as the scoop measures in millilitres rather than grams.

How is the protein combo made?

The majority of the main ingredients in Instant Whey™ PRO are whey isolates, which are 90% protein and are created by separating components from milk. By using whey isolates, we are able to deliver A+ grade whey protein.

Reflex Nutrition’s Micellar Casein is made with EU sourced milk, produced by grass-fed cattle, with absolutely no bovine growth hormone or banned antibiotics. We specifically do not use milk or whey products from the USA because of the widespread use of growth hormones and antibiotics.

The process involved in making our Micellar Casein employs state of the art ultra filtration that is carried out at low temperature to capture every single valuable milk protein in its native form. By using a low temperature, we are able to carefully filter out unwanted fat and sugars without harming the protein molecules, resulting in an exceptional casein powder.

Our Micellar Casein does not contain any other types of added protein, including soy, glycine or anything that would water the product down. As a result, it delivers more protein than nearly any other time release protein shake on the market today, with a hefty 76% guaranteed protein per serving.

How does the protein combo taste?

Using the latest technology, our R&D team has created (in our opinion) the very best tasting Instant Whey in the UK. Effectively sweetened to both improve and balance flavour, Instant Whey ™ PRO mixes well with milk, or for those looking to reduce calorie intake, equally well with water.

Replicating milkshake in both texture and taste, Instant Whey ™ PRO can now be enjoyed in nine flavours:

Banana & Custard, Banoffee Pie, Choc-mint Perfection, Chocolate Perfection, Choc-peanut Butter, Cinnamon Vanilla Roll, Raspberry Delight, Strawberries & Cream, Vanilla Ice Cream

With new flavour technology, our Micellar Casein tastes delicious. We’ve dramatically improved the flavour without adding sugars, corn syrups or creamers.

Micellar Casein comes in five flavours:
Banana and custard, Chocolate mint perfection, Chocolate perfection, Strawberries and cream, Vanilla ice cream

The science behind it

The majority of the main ingredients in Instant Whey™ PRO are whey isolates which are 90% protein. Some brands include these but currently none use native whey isolate as a main ingredient: this is the ultimate A+ grade whey protein. Our Native Whey protein is obtained through a very specific process that differs from standard whey protein: the proteins are extracted directly from EU skimmed milk, using membrane technologies at a low temperature of just 10 degrees C. This state of the art low temperature process removes casein, fat and lactose to leave only the purest, most biologically active whey protein.

Reflex’s Instant Whey™ PRO also provides four types of friendly bacteria (Lactobacillus acidophilus, Bifidobacterium bifidum, Bacillus coagulans and Lactobacillus rhamnosus), providing a total of two billion gut-helping bacteria per 100g of product.

Casein provides a slow-release protein source to provide muscles with a sustained level of amino acids. Once the casein hits the stomach acids, it turns into a gel, slowing digestion and allowing the protein to be released over a sustained period of time, for up to six hours while you’re asleep or resting. When asleep the body goes without nutrients, which is where slow-release protein comes in. By providing a protein that the body digests slowly while you sleep, your muscles are provided with amino acids to aid the maintenance and growth of muscles throughout the recovery period.

Micellar Casein from Reflex Nutrition is not to be confused with acid casein or caseinates which are made using manufacturing processes which can denature the protein, meaning the nutritional value of the protein is lessened.

Anything else?

Instant Whey™ PRO is available in three sizes: 900g, 2.2kg and 4.4kg tubs, with respectively 36, 88 and 176 servings.

Micellar Casein is available in 909g and 1.8Kg tubs, with 54 and 27 servings respectively.

Suitable for

  • Vegetarians: Yes
  • Vegans: No
  • Coeliacs: No

Instant Whey PRO and Micellar Casein (in all flavours) have been certified as Halal safe by The Halal Trust.

For further allergy advice, please read our suitability guide.


Instant Whey™ PRO

Instant Whey™ PRO Blend (Undenatured Native Whey Protein isolate & Undenatured Cross-Flow Micro-Filtered Whey Protein isolate, Undenatured Ultra-Filtered Whey Protein concentrate), Muscle Drive™ [(Peptide-Bonded Glutamine (derived from wheat protein), Hydrolysed Whey Protein (30% degree of hydrolysis), L-Glutamine], Thickener (Undenatured Milk Protein, Carboxymethyl Cellulose, Potassium Cloride), Flavouring, Natural Colourings [fat-reduced cocoa powder (chocolate and banoffee varieties only), Betanin (strawberry and raspberry varieties only), Beta Carotene (banana, banoffee, cinnamon & vanilla varieties only)], Artificial Sweeteners (Acesulfame K, Sucralose), Digezyme® Enzyme Complex (Amylase, Protease, Cellulase, Lactase, Lipase), Emulsifier (Soya Lecithin), Probiotic Blend [Bacillus Coagulans (LactoSpore®), Bifidobacterium Bifidum, Lactobacillus Acidophilus, Lactobacillus Rhamnosus].

Micellar Casein

Milk Protein Concentrate (80% micellar casein, 20% native whey protein), Flavourings, Natural Colourings (fat reduced cocoa powder (chocolate varieties only), Betanin (strawberry variety only), Beta Carotene (banana and vanilla varieties only)), Carboxymethyl Cellulose, Artificial Sweeteners (acesulfame K, sucralose), LactoSpore® Probiotics (bacillus coagulans).

Nutritional Profile

Instant Whey™ PRO
Instant Whey PRO typical values - Reflex Nutrition
Micellar Casein
Micellar Casein.indd

Product Label

Instant Whey™ PRO
Micellar Casein