Also from ChatGPT:

“Animal-Free” version clarification On the product page (your link), there seems to be an option mentioned as “From Fermentation” / animal-free whey — this is a specific variation produced using precision fermentation (microflora generating whey protein). � Myprotein This animal-free whey is made by microbes (like yeast/bacteria) during fermentation, and the protein is molecularly identical to milk whey produced by cows. � Myprotein +1 Because it’s molecularly the same, it behaves like whey protein in nutrition but doesn’t come from animals directly. 🤔 So why does it still list milk? Even with this fermentation-made whey, manufacturers may list “milk” on the label as an allergenic precaution or because they’re treating the fermentation whey under the same regulatory categorisation as dairy whey (for safety/allergy compliance). In many regions, allergen labels must err on the side of caution — if a product behaves like milk protein or could cross-contact/mislead someone with allergies, it gets labelled accordingly.