The humble beginnings of whey protein powder can be attributed to cheesemaking – a process where enzymes separate milk into curds and liquid. Historically, this discarded byproduct was seen as waste, often used as animal feed or fertiliser. However, it's now at the forefront of a booming health trend in the UK, with 'proteinmaxxing' leading the charge.
Whey protein has gained popularity over the past five years, going from being primarily consumed by bodybuilders to attracting a diverse range of consumers. According to a 2025 survey, three-quarters (71%) of US adults are actively trying to increase their protein intake – up from 59% in 2022.
A study by the NHS-backed British Heart Foundation found that incorporating whey protein into meals can help reduce body fat and improve overall health. While its long history dates back to ancient Greece, where Hippocrates prescribed it for immune system fortification around 460 BC, modern production involves filtering, purifying, evaporating, and spray-drying the liquid to create a versatile powder.
The demand for whey protein is outstripping supply, with some manufacturers facing significant shortfalls. According to the University of Wisconsin's Center for Dairy Research, there are numerous unfilled orders due to insufficient product. As a result, manufacturers are investing in new equipment or constructing entirely new facilities to boost production.