Protein has become one of food and nutrition’s biggest commercial success stories.
What was once predominantly associated with sports nutrition has moved firmly into the mainstream. High-protein claims now appear across dairy, beverages, cereals, bakery, snacks, ready meals and categories that historically had little connection with protein positioning.
And consumer appetite shows little sign of slowing.
Euromonitor reported in July 2026 that foods, beverages and supplements positioned around high protein generated more than US$3 trillion in global retail sales in 2025, with global protein demand forecast to grow by 11% between 2024 and 2029.
But as manufacturers compete on ever-higher grams per serving, nutrition science is asking a more nuanced question:
When it comes to protein, is more always better — or should we be paying greater attention to quality, source and dietary context?
The protein numbers race
The appeal of protein is easy to understand.
It is an essential nutrient with well-established roles in maintaining and repairing body tissues, including muscle. Protein has also developed a powerful consumer health halo, helping high-protein positioning move beyond athletes and gym-goers towards a much broader audience.
For manufacturers, this has created a significant innovation platform.
But it has also encouraged an increasingly numbers-driven marketplace: 15 g, 20 g, 25 g, 30 g of protein per serving.
The number is simple to communicate. Protein quality is considerably more complicated.
And that distinction matters.
What do we actually mean by “protein quality”?
Protein quality has traditionally been assessed according to factors including a protein’s indispensable amino-acid composition and digestibility.
One established approach is the Digestible Indispensable Amino Acid Score (DIAAS), which evaluates the digestibility of individual indispensable amino acids in a protein source and compares these with human amino-acid requirements.
From this perspective, not all proteins are nutritionally equivalent.
Protein sources differ in amino-acid composition and digestibility, meaning that the same number of protein grams does not necessarily provide the same quantity of digestible indispensable amino acids.
This is particularly relevant when the nutritional objective is supporting muscle protein synthesis or meeting the needs of population groups for whom maintaining muscle becomes especially important.
But does a higher amino-acid quality score necessarily mean that the food itself is healthier?
That is where the discussion becomes more interesting.
The protein paradox: quality depends on what we are measuring
A 2026 review published in Current Nutrition Reports challenges the assumption that conventional amino-acid-based protein quality scores necessarily predict the long-term health effects of protein-containing foods.
The authors describe what they call a “protein paradox.”
Animal proteins generally achieve higher scores on conventional protein-quality measures because of their indispensable amino-acid composition and digestibility. Yet the review found that these higher scores do not consistently translate into better long-term cardiometabolic or mortality outcomes.
Why?
Because people eat foods, not isolated proteins.
A food delivering protein also brings with it a wider nutritional matrix: fats, carbohydrates, fibre, vitamins, minerals and numerous other components. Foods are then consumed as part of broader dietary patterns.
The authors therefore argue that assessing the health value of protein foods solely through amino-acid composition risks overlooking the importance of the whole food matrix and overall diet.
This does not mean conventional protein-quality measures are irrelevant.
Quite the opposite.
Another 2026 review in Nutrition Reviews highlights the importance of digestibility, indispensable amino-acid availability and DIAAS when considering outcomes such as muscle protein synthesis, muscle preservation and anabolic responses, particularly in ageing populations.
The two perspectives highlight an important distinction:
Protein quality depends partly on the question we are trying to answer.
If the question is whether a protein provides adequate digestible indispensable amino acids, measures such as DIAAS are highly relevant.
If the question is whether eating a particular protein-containing food supports long-term health, the nutritional characteristics of the whole food and the wider dietary pattern also matter.
From protein quantity to protein context
This creates a much richer conversation for the food industry.
Rather than focusing solely on:
“How many grams of protein can we put into this product?”
innovation could increasingly ask:
How much protein? From which source? With which amino-acid profile? How digestible is it? In what food matrix? For which consumer? And for what nutritional purpose?
The answer may differ considerably depending on the product and population.
For an older consumer, maintaining muscle mass and function may make protein quantity, quality and amino-acid availability particularly relevant.
For a plant-based product, complementary protein sources may help deliver a more balanced indispensable amino-acid profile.
For an everyday snack or breakfast product, protein may need to be considered alongside fibre, saturated fat, sugars, micronutrients, energy density and the overall nutritional profile.
And for consumers already consuming adequate protein, simply adding more may not necessarily provide the most meaningful nutritional improvement.
Could the next protein opportunity be more targeted?
This is where the next phase of protein innovation could become particularly interesting.
Protein has successfully moved into the mainstream. The opportunity now may be to become more purposeful.
Rather than developing products simply because “high protein” sells, manufacturers could increasingly design protein propositions around specific nutritional needs and occasions.
That could include healthy ageing and muscle maintenance, active lifestyles, satiety-focused products, plant-based nutrition or convenient nutrient-dense foods.
It also creates opportunities for more sophisticated communication.
A front-of-pack protein number is easy for consumers to understand, but manufacturers can potentially tell a richer story around protein source, quality, complementary ingredients and nutritional purpose.
The challenge will be doing so without making protein unnecessarily complicated for consumers.
Protein innovation is also a formulation challenge
There is another reason why simply adding more protein is not always straightforward.
Protein influences taste, texture, viscosity, stability and overall sensory experience. Increasing protein content can create formulation challenges, and different protein ingredients behave differently depending on the application.
This means that the race for ever-higher protein numbers needs to be balanced against the characteristics that ultimately determine whether consumers buy a product again: taste, texture, convenience and enjoyment.
For product developers, the best protein innovation may therefore not necessarily be the formulation with the highest possible protein content.
It may be the formulation that delivers the right protein, at the right level, within a product consumers genuinely want to eat.
What could this mean for the food industry?
Protein is unlikely to lose its appeal anytime soon. But the category may be reaching a point where “high protein” alone becomes less differentiating.
For manufacturers, the next phase could involve moving from protein addition towards protein strategy.
That means considering protein as part of the complete nutritional and sensory proposition:
Quantity + quality + source + food matrix + consumer need + eating occasion.
This does not make grams of protein unimportant. Quantity remains a fundamental part of protein nutrition.
But quantity alone does not tell the whole story.
As the market matures, the companies that can translate increasingly sophisticated protein science into products that are nutritionally meaningful, enjoyable and easy for consumers to understand may have the greatest opportunity to differentiate.
The Nutricomms Perspective
At Nutricomms, we see the protein boom entering a more mature phase.
The first wave successfully made consumers care about how much protein a product contains. The next opportunity could be to help them understand what that protein delivers, where it comes from and why it is relevant to them.
For the food industry, this means moving beyond a race for the biggest number on pack. Protein quality, source, digestibility, food matrix, life stage and nutritional purpose can all become part of smarter product development.
The challenge will be to translate that complexity into propositions consumers can understand without losing the simplicity that helped make protein so successful in the first place.
The protein boom isn’t slowing down. But its next chapter may be less about adding more — and more about making every gram count.
References
- López-Moreno M, Barrantes-Espinola G, Craddock JC. (2026). Protein Paradox: Protein Quality Based on Amino Acids Composition is Poorly Associated with Health Outcomes. Current Nutrition Reports. https://pmc.ncbi.nlm.nih.gov/articles/PMC13099674/
- Rowlands DS et al. (2026). Dietary Protein, DIAAS, Anabolism, and Cardiometabolic Health: A Review and Future Perspectives. Nutrition Reviews. https://academic.oup.com/nutritionreviews/advance-article/doi/10.1093/nutrit/nuag101/8746284
- Euromonitor International (2026). High-protein foods, beverages and supplements market analysis and protein-demand outlook. https://www.euromonitor.com/article/proteinmaxxing-and-the-future-of-protein-demand
