Many cosmetic ingredients historically have animal origins, though there's been a significant push toward synthetic and plant-derived alternatives in recent years due to ethical concerns, sustainability, and consumer demand. Here are some traditional cosmetic ingredients that can have an animal origin:

• Collagen. This protein is often derived from the connective tissues of animals, especially bovines and fish. It's widely used in cosmetic products for its purported anti-aging properties.
• Keratin. Typically derived from the hair, nails, and horns of various animals. It's used in many hair care products for its strengthening properties.
• Guanine. Derived from fish scales, it's frequently used in mascaras, nail products, and lipsticks to provide a shimmering effect.
• Tallow. A processed form of beef or mutton fat. Used in soaps, foundations, and lipsticks.
• Lanolin. Extracted from the oil glands of sheep, it's used in numerous skin and hair products for its moisturizing attributes.
• Gelatin. Derived from boiling animal bones, ligaments, and tendons. Utilized in creamy cosmetics and nail treatments.
• Stearic Acid. Can be derived from pigs' stomachs and is utilized as an emulsifier in various cosmetics.
• Squalene. Historically sourced from shark liver oil, it's used in moisturizers and cosmetics as an emollient.
• Chitosan. Derived from the shells of crustaceans like shrimp and crabs. Used in hair care, skincare, and oral hygiene products.
• Ambergris. Derived from the digestive system of sperm whales, it acts as a fixative in perfumery.
• Carmine (Cochineal or Crimson Lake). A red pigment derived from crushed cochineal insects. Used to color lipsticks, blushes, eyeshadows, and other cosmetics.
• Musk. Traditionally sourced from the glands of musk deer. Used in perfumery.
• Placental Protein. Extracted from animal placentas (commonly sheep). Used in certain hair conditioners and facial treatments.
• Shellac. Sourced from the lac bug and utilized in nail polishes and hair sprays.
• Elastin. Found in the neck ligaments and aortas of cows. Used in products claiming anti-aging benefits.