Yes, sardines on toast can be a nutritious and healthy choice. Sardines are an excellent source of omega-3 fatty acids. They are also rich in protein, which supports muscle growth and repair. Additionally, provide vitamin D, vitamin B12, calcium, and selenium. When served on whole-grain toast, this dish provides complex carbs, fiber, and additional nutrients from the grains. Whole grains are a healthier choice because they are rich in fiber, vitamins, and minerals.