Compare protein blends on the protein sources in the ingredients list, the protein per serving and the cost per 25g of protein. A blend mixes two or more proteins, such as whey concentrate, whey isolate, casein or egg, and the label doesn't always show how much of each you're getting.
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What is a protein blend?
A protein blend is a powder made from more than one protein source. In this collection that includes whey "complex" products mixing concentrate and isolate, multi-source formulas, and a whey and egg combination.
The ingredients list is in descending order of weight, so the first protein listed makes up the largest share. If a cheaper concentrate comes first and isolate further down, the product is mostly concentrate, whatever the front of the tub suggests.
Are protein blends better than whey alone?
Not automatically. Different milk proteins digest at different speeds: in one study, whey produced a dramatic but short increase of amino acids in the blood while casein produced a longer, more moderate rise, and blends combine the two.
There is far less research comparing blends with single-source whey, and we don't claim blends do more. "Adding more ingredients doesn't automatically make a product more effective. Each ingredient needs a clear purpose, an appropriate dose and evidence supporting its intended use," says Andy Arshad, who runs SupplementHQ. Compare with casein and whey isolate.
How do you compare protein blends on value?
Calculate the cost per 25g of protein, then check the ingredients order to see what you're paying for. Divide the price by the total protein in the tub (servings × protein per serving) and multiply by 25.
"Concentrate, isolate and blends are marketed differently, and customers can end up paying considerably more without fully understanding what they're getting," says Andy. Most blends here contain milk, one of the 14 allergens that must be emphasised within the ingredients list, and some also contain egg, so check the label. Compare across all protein powder.
We sell the products on this page. That's our commercial interest, and it's why we show the evidence alongside them. This page is general information for adults, not personalised medical advice. Food supplements should not replace a varied, balanced diet.
Written by Andy Arshad, SupplementHQ. Last reviewed 11 October 2026.