Development of mackerel meal-based RUFF (Ready-to-Use Fish Food) product with the addition of sardine, soybean, and red palm oil in malnourished rat modelsAllecya Tri Elisabeth Sihombing, Puspo Edi Giriwono and SaraswatiBIO Web Conf., 169 (2025) 04006DOI: https://doi.org/10.1051/bioconf/202516904006