Animal-derived products are substances obtained directly from animals or their by-products, often used in various industries including pharmaceuticals, cosmetics, and food. These materials can include proteins, enzymes, hormones, and other biological molecules extracted from animal tissues such as skin, blood, and milk. For example, bovine serum is frequently utilized as a nutrient source in cell culture media, while collagen derived from fish or cows finds applications in skincare products due to its excellent moisturizing properties. The use of these products requires strict quality control measures to ensure safety and efficacy, addressing concerns related to pathogens and allergens.