Nutrition supplement maker Glanbia hiked its full-year profit forecast following bumper demand for its protein products, including from customers using them in tandem with weight-loss drugs. It had guided in late April that it would hit the upper end of a 7% to 11% range. The additional demand has exacerbated a rise in the cost of whey — a key ingredient in protein products — by gobbling up any new supply. Glanbia expects a double-digit percentage rise in whey costs for the rest of 2026 and into 2027, Garvey said. Optimum Nutrition consumers will face another price hike this quarter, which Glanbia expects to temper demand growth slightly in the second half.