Severe allergic reaction after sipping energy drink traced to unexpected source

A 15-year-old boy developed a severe allergic reaction after drinking an energy drink containing collagen derived from cod. The case highlights how fish-derived ingredients in drinks and supplements may trigger reactions, even when standard allergy tests are negative.

The teen experienced widespread hives, wheezing and difficulty breathing and was treated in hospital with two doses of epinephrine, as well as other medication and fluids. He had previously reported mild symptoms after eating canned tuna but tolerated salmon; skin-prick tests for tuna, cod and flounder were negative. The case was presented at an allergy conference and has not yet been published in a peer-reviewed journal, so it does not establish how common such reactions are.