Whey protein products look interchangeable on the shelf, but they differ in protein content per serving, protein type, ingredient list length and real price per gram of protein. This guide shows how to compare them using only what the label already tells you.
What matters most when comparing whey proteins?
Compare protein per 100 g, not the marketing name. A good whey product typically declares 70–90 g of protein per 100 g of powder. Divide the price by total grams of protein in the tub to get the only number that makes two products directly comparable: price per gram of protein.
The EU nutrition declaration on the back of the pack makes this possible for every product sold in Europe: protein content per 100 g is mandatory information. Serving sizes vary between brands — 25 g, 30 g, 35 g scoops — so per-serving claims on the front are not comparable between products, while per-100 g values always are. This is also why Supplenivo product pages show the per-100 g declaration in the same place for every product.
Concentrate, isolate or hydrolysate — what is the difference?
Whey concentrate (WPC) is the standard form: typically around 70–80% protein, with slightly more lactose and fat, and usually the best price per gram of protein. Whey isolate (WPI) is filtered further — typically over 85% protein with minimal lactose. Hydrolysate (WPH) is pre-split for faster absorption and costs the most.
For most people mixing shakes around training, a quality concentrate is the practical choice. Isolate earns its premium mainly if you want fewer carbohydrates and fat per serving or tolerate lactose poorly, since most of the lactose is removed with the other non-protein components. Blends of concentrate and isolate sit between the two: check the ingredient list order — the ingredient listed first is the one there is most of, which tells you whether a “whey isolate blend” is mostly isolate or mostly concentrate.
How do I read the ingredient list?
Ingredients are listed in descending order by weight — EU labelling rules require it. A short list starting with whey protein concentrate or isolate is a good sign. Long tails of thickeners, fillers and multiple sweeteners usually mean the product prioritises texture and taste economics over protein content.
Flavoured products are always a compromise: cocoa, flavouring and sweetener take room that plain versions give to protein, which is why the chocolate version of the same product typically declares a few grams less protein per 100 g than the natural one. That is normal — just include it in the per-gram price calculation when the flavoured tub costs the same as the plain one.
So which whey should I buy?
Pick by your actual constraint. Best value: a concentrate with high protein per 100 g and a clean ingredient list. Lactose sensitivity or low-carb targets: an isolate. Otherwise the honest answer is that consistent daily protein intake matters far more than the difference between two decent products.