Randomized trial investigates vitamin D's impact on fish health and nutritional quality in farmed salmon.
Key Points
This research explores how increased dietary vitamin D 3 affects salmon health and nutrient storage during winter.
Farmed Atlantic salmon (Salmo salar) were fed either a control diet (4000 IU/kg) or a high vitamin D 3 diet (40000 IU/kg) for 32 weeks from November to July.
Tissue samples (plasma, liver, muscle) were analyzed for vitamin D 3 and its metabolites (25(OH)D 3 and 1,25(OH) 2 D 3).
The study monitored fish growth and mortality to assess health effects.
High dietary vitamin D 3 significantly increased plasma, liver, and muscle concentrations of vitamin D 3 without adverse health effects.
Concentrations of hydroxylated metabolites showed less pronounced increases compared to total vitamin D 3 levels.
Seasonal variations in vitamin D levels were observed in all tissues examined.
Cite This Study
Keitel‐Gröner et al. (2026) studied this question.