New Zealand dairy companies are cashing in on a surge in global demand for bioactive proteins found in cow's milk, like whey, off the back of the surge in weightloss drugs.

New Zealand dairy companies are cashing in on a surge in global demand for bioactive proteins found in cow's milk, like whey, off the back of the surge in weightloss drugs.

Weight-loss drugs and high-protein diets are boosting demand for whey.