Study points to sanguinarine as histamine buffer in juvenile eels

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A new study in Animals reports that sanguinarine, a plant-derived alkaloid used in some feed additives, may help offset the damage caused by excess dietary histamine in juvenile American eels. The paper, from researchers at Jimei University, builds on a broader line of work showing that histamine accumulating in animal-derived feed ingredients can impair eel growth, gut integrity, antioxidant defenses, and liver health. In the new experiment, the authors tested whether adding sanguinarine to a high-histamine diet could blunt those effects, and concluded that supplementation improved growth-related outcomes and reduced signs of intestinal and hepatic injury under histamine stress. (frontiersin.org)

Why it matters: For veterinary professionals working in aquaculture, the study adds to a growing body of evidence that histamine is more than a feed-quality marker in eels, it may be a direct driver of gut and liver pathology. Prior American eel studies from the same research group and others have linked elevated dietary histamine with oxidative stress, impaired intestinal barrier function, poorer feed utilization, and reduced immune competence, while testing nutritional countermeasures such as proanthocyanidins and chlorogenic acid. That makes this latest paper less a standalone finding than part of a practical trend: using functional additives to reduce the biologic cost of lower-quality fishmeal or histamine-heavy diets. (frontiersin.org)

What to watch: The next question is whether sanguinarine can move from controlled feeding trials into commercial eel diets with clear dose guidance, safety margins, cost-benefit data, and validation across other farmed species. (sciencedirect.com)