The buying guide
How to choose a clear whey protein
Eight things worth checking before you spend money on a clear whey protein, in the order they actually matter. No rankings, because we have not tested every product on the market and neither has anyone else publishing a top ten.
Check protein per 100g rather than per scoop, confirm it says isolate rather than just whey, find out which sweetener it uses and at what level, and look for an independent laboratory assay of the batch rather than a supplier's own certificate. Those four checks separate most of the market. Price per serving, not price per tub, is how you compare what is left.
Why most buying guides are useless
Almost every list of the best clear whey proteins is an affiliate page. The ranking is decided by which brands pay a commission, and the review text is written from the product description rather than from drinking it. That is not a conspiracy theory, it is the published business model of most of the sites that rank for this search.
We are not going to publish a better version of that list, because we would be ranking competitors we have not laboratory tested while selling a product of our own. Instead here is the checklist we are using to hold our own supplier to account. Use it on us as well as on everyone else.
1. Protein per 100g, not per scoop
Scoop sizes are not standardised, so protein per serving tells you very little on its own. A product advertising 25g of protein might be doing it with a 30g scoop or a 40g scoop, and those are very different products at very different costs. Protein per 100g of powder is the number that lets you compare two tubs directly. Every brand has to declare it in the nutrition panel, which is exactly why the marketing tends to quote the other one.
2. Isolate, or just whey
Only whey protein isolate mixes genuinely clear. If the ingredients list leads with whey protein concentrate, the drink will be cloudy and heavier no matter what the front of the pack calls it. Some products blend the two to hit a price, which produces something in between: not creamy enough to be a shake, not clean enough to be a clear protein.
Clear does not mean dairy free. Whey is a milk derivative, so every clear whey protein carries a milk allergen declaration. If you are avoiding dairy entirely you want a plant protein, and it will not be clear in the same way.
3. The sweetener system, and the dose
This is the single most common reason someone abandons a tub after three servings, and it is the specification almost nobody publishes. Sucralose, acesulfame K, stevia and sucralose blends all taste different, and the same sweetener at two different levels produces two completely different drinks. If a brand will not tell you which sweetener and roughly how much, that is information, not an oversight.
If sweetness is the thing that has put you off protein before, buy the smallest size a brand sells before you commit to a tub. Nobody who has finished a 1kg bag of something they find cloying does it twice.
4. Independent testing, not a supplier certificate
There are two very different documents that both get called testing. A certificate of analysis from the manufacturer is the supplier certifying their own product against their own specification. An independent assay is a third-party laboratory testing the batch that is actually in the bag. Only one of those is a verification, and brands are rarely explicit about which one they are showing you.
Independent testing across the wider protein category has repeatedly found products containing less protein than the label states. One route is amino spiking, where cheap free-form amino acids such as glycine or taurine are added to inflate the nitrogen reading that standard protein testing measures. Ask whether the number on the pack came from a nitrogen test or from an amino acid profile, and ask who ran it.
5. Price per serving, not price per tub
A 1kg bag at £30 and a 500g bag at £18 are not obviously comparable until you divide by servings, and servings depend on scoop size, which brings you back to point one. Work out the cost of one serving and the cost of 30g of actual protein. The second number is the one that exposes a weak product with a generous scoop.
| What you compare | What it tells you | How it gets gamed |
|---|---|---|
| Price per tub | Almost nothing. Tubs are not the same size. | Smaller tubs at a lower headline price. |
| Price per serving | More useful, but only if servings are the same size. | A smaller scoop makes servings cheaper and more numerous. |
| Price per 30g of protein | The comparison that actually holds across brands. | It does not really. This is the one to use. |
6. Whether it dissolves in cold water without a shaker
Clear whey is supposed to be the format you can make in a glass with a spoon. Some of them are not, and clump at the bottom until you find a shaker and thirty seconds of effort. If the point of buying a clear protein is that it is easier, a product that needs equipment has failed at the only job that distinguishes it.
7. Where it is actually made
Most supplement brands do not own a factory. That is normal and not in itself a problem. What matters is whether the brand will tell you which contract manufacturer blends it, what accreditations that site holds, and whether the site is audited. A brand that treats its manufacturer as a secret is usually protecting a commercial relationship rather than a formulation.
8. What happens when you complain
Read the returns policy before you need it, particularly for opened food products, where the statutory position and the brand's goodwill position can be very different. A brand confident in the taste will let you open the bag. One that will not is telling you something about its own expectations.
- Is there a refund on an opened pouch, or only an unopened one
- Is there a human contact route, or only a form
- Do they publish batch information, and can you match it to the pack in your hand
- Do they answer a question about sweetener level directly, or move you on to a benefit
What we are holding ourselves to
Hold us to four things. We publish protein per 100g, the sweetener and its level, the independent assay for the launch batch, and the name of the manufacturer. brim is in development, so these are commitments to check rather than a track record, and if any of them turns out worse than we hoped we publish that too.
See the product we are building against this checklist
One pouch, one flavour, clear whey isolate, sweetened well below the category norm, built against the checklist on this page. The waitlist picks the flavour and the sweetness level, and hears the launch price first.
See the product
This page is a buying guide for a product category, not medical or dietary advice, and it makes no claim about a brim product or any named competitor. brim launches once a batch is made and independently assayed, and both are published here.
