Protein shakes have a texture problem. They sit grainy on the tongue, they don't flow smoothly down the throat, and they often taste like something you'd rather not finish. But researchers across three institutions say they've found a way to fix that, and it comes down to how the powder gets made.
A collaborative effort between the University of Reading, Aberystwyth University, and Arla Foods Ingredients has yielded a new approach to processing whey protein that delivers both smoother texture and cleaner flavor. Their work, detailed in the International Dairy Journal, points to specific manufacturing tweaks that could reshape how these shakes taste and feel in your mouth.
Holly Giles, the PhD researcher leading the work at the University of Reading, framed the stakes plainly: millions of people depend on protein drinks, whether they're serious gym-goers chasing muscle gains or older adults trying to maintain strength. When those drinks are unpleasant to consume, people skip them.
The pathway to improvement started with an earlier discovery by the same team. Using controlled pressure to push liquid whey through fine membranes, they found they could concentrate alpha-lactalbumin, a protein prized in infant formula, to more than twice its normal levels. They then scaled up this technique at AberInnovation's pilot food processing facility to create samples suitable for rigorous taste testing.
A trained sensory panel immediately detected the upside. The enriched whey delivered noticeably better texture, with less friction in the mouth and a noticeably smoother drinking experience overall. That was encouraging.
Then came the hitch. Tasters also reported unwanted bitter and peppery notes that hadn't been there before. The researchers initially suspected the concentrated protein itself was to blame. But deeper analysis revealed the culprit wasn't the protein at all. Instead, minerals that had become concentrated during the processing step were responsible for the off-flavors.
With the source of the problem identified, the team modified their filtration process to strip out those concentrated minerals while preserving the texture gains. The result was a product that kept the smoothness that made people want to drink it while achieving taste characteristics on par with standard whey protein.
Giles summed up the significance: understanding how both proteins and minerals influence whey's sensory profile opens the door to further improvements. For the millions of people looking to boost their protein intake, that could mean the difference between a supplement they actually finish and one that sits half-empty on the shelf.
Author Jessica Williams: "This is real applied science solving a real problem that has annoyed fitness enthusiasts and older adults for years."
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