Part I: The Science of Salmon
Salmon’s Nutritional Profile
Salmon is rich in:
Omega-3 fatty acids (EPA and DHA): Essential for heart and brain health.
Protein: High-quality, complete protein for muscle repair.
Vitamins: B12, D, and antioxidants like astaxanthin (which gives salmon its pink hue).
Minerals: Selenium, potassium, and magnesium.
These nutrients make salmon a superfood—but they also make it delicate. The very fats that benefit your health are prone to oxidation, which can cause discoloration.
Part II: Causes of Yellow Stains on Salmon
1. Oxidation of Fatty Acids
Salmon contains high levels of unsaturated fats. When exposed to air, these fats oxidize, producing compounds that can alter color. A yellowish hue may appear, especially if the fish has been stored for several days.
Impact: Oxidation doesn’t always mean spoilage, but it can affect flavor, making salmon taste rancid or “off.”
2. Spoilage and Bacterial Growth
