Rule One Clear Isolate 689 g - Crystal Clear Protein Isolate & Electrolytes

What is Rule One Clear Isolate 689 g?

Rule One Clear Isolate is a clear whey in a 689 g tub, that is to say a whey protein isolate formulated to stay dissolved in an acidic medium and give a translucent, fruity drink rather than a creamy shake. It is made by Rule One, an American brand.

The base is a whey isolate, never a concentrate: only that degree of filtration allows the clarity. The rest of the list is short — natural and artificial flavourings, malic acid and citric acid for the tartness, salt, sucralose and acesulfame potassium as sweeteners, silicon dioxide as an anti-foaming agent, potassium chloride, and blue spirulina as a colouring in the relevant flavours.

The flavours on offer: Blue Raspberry, Cherry Limeade, Peach Mango and Strawberry Lemonade. The register is that of a lemonade, not of a milky dessert. The manufacturer states that its batches undergo third-party laboratory testing for banned substances; we report that information and attribute it to them, not having seen the reports.

What does a serving of Clear Isolate contain?

The reference serving is 25 g. It provides 20 g of protein for 90 kcal (377 kJ), 1 g of carbohydrate, 0 g of fat, 0.3 g of salt and 120 mg of sodium. The 689 g tub covers 27 servings.

Two figures deserve to be looked at together. First the protein density: 20 g of protein in 25 g of powder, that is 80 g per 100 g. Then the size of the serving. Clear wheys are generally dosed at around 20 to 25 g against 30 to 35 g for a conventional whey, because beyond that the drink turns syrupy. This one therefore sits at the top of its category for the amount of protein actually delivered per serving, which is not that common.

* Column calculated from the values declared for 25 g, the manufacturer not publishing a per 100 g column. ** Reference intake of an average adult (8,400 kJ / 2,000 kcal, 50 g of protein, 6 g of salt). Two pieces of data are missing and we are not inventing them: the “of which saturates” line and the “of which sugars” line do not appear in the data supplied by the manufacturer. Nor is the mineral-by-mineral breakdown of the electrolyte complex published: only the sodium is quantified. The values correspond to the Blue Raspberry flavour and may vary slightly from one flavour to another.

The product comfortably exceeds the regulatory threshold allowing the “high protein” nutrition claim — protein accounts for close to 90% of the serving's energy. As for health claims, the authorised wordings are these: protein contributes to a growth in muscle mass, to the maintenance of muscle mass and to the maintenance of normal bones. No recovery claim exists for protein, and we shall not write one.

How do you prepare Rule One Clear Isolate?

The manufacturer specifies a 25 g serving in 350 to 400 ml of ice-cold water, to be shaken vigorously and then left to stand for 30 seconds while the foam subsides. One or two servings a day are enough for most uses; no course length is given, and there is no reason for one with a protein.

The timing: 30 minutes before the session, or immediately after, or at any point in the day to top up an intake. The timing matters less than the total protein over 24 hours — that is the point on which most labels mislead you.

Two instructions apply specifically to this type of product. Do not mix it with milk: the acidity makes the casein flocculate and the drink turns grainy. And do not heat it, do not use it in baking: a clear whey coagulates when cooked. For cooking, keep a whey concentrate.

Who is Clear Isolate for, and who is it not for?

It is aimed first of all at those who can no longer stomach the milky shake format — heaviness on digestion, the taste of vanilla every day, or simply a summer session after which nothing creamy will go down. A protein you do not drink is of no use: that is the soundest use case.

The product contains MILK. It is made in a facility that also handles SOYA, EGG and FISH, and may contain traces of them. In the case of a diagnosed allergy to cow's milk proteins, it is contraindicated: filtration removes the lactose, not the proteins. The manufacturer advises against it for children under 12 and invites pregnant or breastfeeding women, as well as people on medication, to seek advice before use. Any kidney or liver condition is a matter for your doctor.

What not to expect from it: the 300 mg of electrolytes per serving do not make it a sports drink. With 1 g of carbohydrate, the formula meets none of the European conditions that would allow a claim on hydration or on endurance. If that is what you are after, look instead at our electrolytes. Nor does it make you lose weight: it supplies a lot of protein for few calories, which helps you hold a deficit, but it is the deficit that does the work.

Clear Isolate or a conventional whey isolate?

Both rest on the same raw material. The difference lies in the formulation and, above all, in what you will do with it.

A conventional whey isolate is the better choice in three clear cases: you have a high protein requirement to cover and you take two or three servings a day, in which case the price per kilo of protein becomes decisive; you cook with your powder; or you prefer a creamy drink that keeps you going between two meals. On those three points, Clear Isolate loses.

Clear Isolate wins when the drink itself is the problem: milky shakes that are hard to digest, weariness of the milky taste, the urge for a cold, tart drink at the end of a session. It also wins on density, with 20 g of protein in a 25 g serving where many clear wheys stop at 18 g. The calculation that settles it remains the same: price of the tub, divided by its weight in kilos, divided by the protein content per 100 g. Do it on both sides before buying. The protein aisle lets you compare every family.

Frequently asked questions

How many servings does a 689 g tub contain?

Twenty-seven 25 g servings. At one serving a day, that covers almost a month; at two servings on training days only, count on longer. The manufacturer states a shelf life of 24 months in the unopened original packaging, kept away from moisture.

Do the nutritional values change with the flavour?

Slightly. The published figures correspond to the Blue Raspberry flavour, and the manufacturer notes that the others may vary a little. The flavours available are Blue Raspberry, Cherry Limeade, Peach Mango and Strawberry Lemonade. The blue colouring is spirulina, present only in the relevant flavours.

When should Clear Isolate be taken during the day?

Thirty minutes before the session, just after, or at any time to make up a shortfall in intake. The thirty-minute window people talked about fifteen years ago no longer holds: what determines the result is the day's total protein. In practice, take it at the moment you will actually drink it.

Can it be mixed with milk?

No, and that is a manufacturer's instruction, not a preference. The acidity of the formula destabilises the casein in milk: the mixture curdles and turns grainy. Use very cold water, 350 to 400 ml per serving. Crushed ice improves the result further.

Do the 300 mg of electrolytes replace a sports drink?

No. Set against the volume of the preparation, the 120 mg of sodium per serving remain well below the levels that characterise a carbohydrate-electrolyte solution within the meaning of European regulation, and the formula supplies only one gram of carbohydrate. Those minerals improve the drink's profile; they do not turn it into an endurance drink.

Does it contain lactose?

Traces only: this is an isolate, filtered to the point of removing most of the lactose and the fat. Many people troubled by a whey concentrate tolerate it without difficulty. Take care not to confuse this with an allergy to cow's milk proteins, which rules the product out — filtration does not remove the proteins.

How do you avoid the foam?

Pour the water in first, the powder second, shake, then leave it to stand for 30 seconds as the manufacturer indicates. Whey proteins are surface-active and stabilise bubbles: the harder you shake, the longer the foam holds. Taking the metal whisk out of the shaker and diluting generously settles the matter. Made in advance and left to chill, the drink is better.

Where to buy Rule One Clear Isolate 689 g?

This page lets you order the flavours, and we ship throughout France and Europe. With a tart drink, the flavour is the one criterion no product page can replace: in our Vendargues shop, around ten minutes from Montpellier, we talk them through with people who have actually drunk them, and we work out the price per kilo of protein against a conventional isolate in front of you.

If what you are after is instead an amino acid drink to sip during exercise, see our EAA; the whole aisle can be found in our sports nutrition section.