Whey vs Plant Protein Powder: Which One for Your Brand?

Whey and plant protein: the basics

Whey is the protein in milk serum, the liquid left over from cheesemaking. It comes in three main forms: concentrate, which keeps some lactose and fat; isolate, which is more refined; and hydrolysate, which is pre-digested. Plant protein is extracted from legumes, grains or seeds: pea, brown rice, soy, fava bean, hemp, sunflower or pumpkin.

"Whey or plant protein?" is one of the most searched questions about protein powder. For a brand, the right answer is less about which one is "better" and more about the target customer, the sales channel and the brand story.

Nutritional quality: amino acids and digestibility

Whey is a complete protein: it provides all nine essential amino acids, with a high leucine content, the amino acid most studied for muscle protein synthesis. It is highly digestible, which explains its long-standing place in sports nutrition.

Single plant proteins often have a limiting amino acid: lysine for rice, methionine for pea. That is why formulators combine sources. A pea and rice blend gives a more balanced profile, close to animal protein. Soy is complete but is a major allergen, which limits its use in some ranges. To compare sources, scientists use scores such as PDCAAS and DIAAS, which account for both amino acids and digestibility.

Side-by-side for brands

Taste: the real challenge for plant protein

The number one reason a consumer does not reorder a protein powder is taste. Whey is easy to flavor: chocolate, vanilla, cookies, strawberry. Plant proteins bring legume notes, a grittier texture and lower solubility. Formulation work means sourcing quality raw materials, blending sources, and fine-tuning flavors, sweeteners and sometimes fiber to deliver a shake people enjoy. Cocoa, vanilla and nutty flavors mask earthy notes well.

Claims: what you can say in the EU

EU health claim rules authorize protein claims such as "protein contributes to a growth in muscle mass", "contributes to the maintenance of muscle mass" and "contributes to the maintenance of normal bones". They can only be used if the product at least meets the conditions for the "source of protein" claim. These claims apply equally to whey and plant protein. A protein powder must never be presented as treating or preventing a disease. If you also sell in the US, claims follow FDA rules, which differ from the EU framework.

Whey, plant or both: range strategy

• Sports and performance brand: a flavored whey isolate, plus a plant version so you do not lose dairy-free customers.
• Natural or wellness brand: a plant protein blend, possibly enriched with fiber, vitamins or superfoods.
• Women's or healthy-aging brand: adapted servings, gentle flavors, messaging on maintaining muscle mass and bones.
• Full sports range: protein, creatine and electrolytes make a consistent trio for a sports nutrition brand.

For whey, see our white label whey protein page. If you are building a sports range, creatine is often the second product launched.

Decisions to make before launch

• Protein per serving: it drives claim eligibility and perceived quality.
• Concentrate or isolate? Isolate is purer and lower in lactose; concentrate is more economical and creamier.
• Which plant sources? Pea alone, a pea and rice blend, or less common sources like fava or hemp.
• Sweetened or not? Unflavored or lightly sweetened versions appeal to clean-label shoppers.
• Organic or conventional? Organic is a strong argument in plant protein and needs to be planned into sourcing.

Who buys protein powder today?

Protein powder has moved well beyond bodybuilders. Buyers now include endurance athletes, people who work out a few times a week, women looking for a convenient protein source, older adults focused on staying active, and busy consumers using a shake as a quick snack. Each group expects something different: performance and macros for some, clean labels, digestibility and taste for others. Plant protein in particular has grown with flexitarian diets, and many households now buy both types.

Beyond the shake: new uses

Protein powder is also used in baking, oatmeal, smoothies and coffee. Brands respond with unflavored versions for cooking, protein lattes and blends with collagen or fiber. A neutral, well-dispersing powder opens these uses and broadens the audience beyond the gym.

Formats: tubs, pouches and stick packs

Protein powder sells mostly in large tubs or stand-up pouches with a scoop. Single-serve stick packs are increasingly used for samplers, gift sets and gym sales: customers can try several flavors before buying a large size.

Quality checks that matter

Protein powders call for specific controls: protein content per serving verified by analysis, microbiology, heavy metals for plant sources, and allergen management on the production line. Consistent particle size and moisture keep the powder free-flowing and the serving accurate from the first scoop to the last. These checks are what allow a brand to print its nutrition panel with confidence.

Making your protein powder in France

Irati Production formulates and manufactures whey and plant protein powders at its ISO 22000 certified site in Saumur, France. We support you on source selection, flavor development, labeling and packing in powders, tubs, pouches or stick packs.