Key takeaways
- High-protein ingredients such as WPC80 and WPI continue to attract robust demand, tightening supplies and supporting higher prices.
- Rising feed and fertiliser costs may limit farmers’ ability to expand production despite improving milk prices.
- More milk won’t solve every problem: If milk output increases, processors will need to carefully balance volumes across dairy categories to avoid oversupplying weaker markets while meeting protein demand.
High-protein diets and the growing use of GLP-1 weight-loss medications are changing consumption patterns globally.
Interest in protein-fortified food and beverage products continues to define entire categories. From coffee to snacks, hardly any facet of the industry has been left untouched by the trend.
As high-quality protein ingredients continue to be in strong demand, the whey protein market is being turned on its head. At the premium end, where highly concentrated protein ingredients such as WPC80 and WPI sit, resilient demand and tight supplies are squeezing availability. Meanwhile, commodity milk powders are experiencing shrinking supply, which is pushing up prices.
But even for those benefiting from the protein boom, there is only so much protein that can be produced from current milk volumes. And expanding production may not be as simple in the current geopolitical climate.
Global milk supply is slowing
Following a significant expansion from mid-2025, global milk supply growth slowed through H2 2026, with further contractions expected in the fourth quarter, Rabobank reports.
To stimulate production, farmgate milk prices across key regions are rising. But the usual cyclicality of the dairy market may be disrupted by ongoing geopolitical pressures.
Specifically, the cost of feed and key inputs such as fertiliser could negatively affect farmer profitability, potentially stalling herd expansion and slowing production, according to Brian Quinn of Quoreka, a commodity trading software provider.
“The cost and availability of feed are making it difficult to produce more milk and bring more cows online,” he said. “And there is only so much protein you can take out of a gallon of milk.”
Producers are therefore caught between several competing dynamics: balancing higher input costs with the incentive to accelerate production and directing milk towards the most profitable categories to capture value.
However, if milk production eventually accelerates again, the additional volume would need to be carefully managed to avoid oversupplying commodity dairy markets where demand growth remains subdued.
For manufacturers, the bigger question is whether the protein market can continue to expand faster than the milk pool, particularly given that the popularity of weight-loss medications has created an additional source of demand in an already busy market.
Is GLP-1 demand here to stay?
However, Quinn cautioned against assuming the weight management trend would continue indefinitely, comparing the current situation with the surge in protein consumption associated with the Atkins diet in the US in the early 2000s.
Nevertheless, if protein demand persists while milk production remains constrained, tightness across the dairy sector is likely to continue.
Conversely, an expanding milk pool would have consequences beyond whey, potentially easing supply pressures elsewhere as processors manage the additional milk required to meet growing protein demand.