Whey concentrate, isolate or plant protein: which one, and what the price difference buys

Protein powder shopping is mostly a choice between three things, and the marketing is built to make it feel like a choice between thirty.

The main types

Concentrate versus isolate, honestly

Isolate is filtered further, so it has more protein and less lactose, fat and carbohydrate per scoop. That is genuinely useful if lactose gives you trouble or if every calorie is accounted for.

For everyone else, concentrate does the same job for less money. The muscle-building difference between them, at equal protein intake, is not something the research picks up. Buy isolate for a reason, not as a default upgrade.

Bloating and gas after a whey shake is usually lactose, not an allergy. Switching to isolate, or to a plant protein, resolves it for most people. A genuine milk protein allergy is a different and much less common thing.

Plant proteins, fairly assessed

Soy protein isolate is complete and well studied, and it is the closest plant equivalent to whey. Pea protein is low in methionine, rice protein is low in lysine, and the standard pea-rice blend exists precisely because each covers the other gap.

Plant proteins have slightly lower leucine content than whey, so a somewhat larger serving evens things out. Texture is grittier and flavours are harder to mask - which is why plant powders more often arrive heavily flavoured and sweetened.

For Indian vegetarians, soy-based products are usually the best value per gram of quality protein, and soya chunks in the kitchen remain cheaper than any tub.

Cost per gram of protein

The only price comparison that means anything. Divide the tub price by the grams of protein in the tub - not by the number of scoops, which is a unit the manufacturer defines.

• Serving sizes vary from 25 g to 40 g between brands, which makes per-serving prices non-comparable.
• A cheap tub with 60 per cent protein is more expensive per gram than a mid-priced one at 80 per cent.
• Flavoured products contain less protein by weight than unflavoured ones - sweeteners and cocoa take up space.
• Mass gainers are almost always the worst value per gram of protein in the shop.

What to ignore

• Added digestive enzyme blends, whose benefit for most users is unclear.
• Added BCAAs, which whey already contains in good quantity.
• Anabolic-sounding marketing on a food product.
• Amino spiking, which is why the full amino acid profile on the label matters - especially given the 2024 Indian testing that found most sampled products missing their protein claims.

The sensible default for most people who want a powder: unflavoured or lightly flavoured whey concentrate from a manufacturer that publishes test results, at the best price per gram of protein you can find from an authorised seller. Everything beyond that is preference or a specific reason.