Traditionally derived from shark liver oil, but now commonly sourced from plant oils like olive oil or synthesized.

 Can be derived from animal fats, but vegetable glycerin from coconut or soy oil is a common alternative.

 Traditionally sourced from animal tissues, but plant-based alternatives like soy protein and synthetic vegan collagen are now available.

Often derived from animal fat, but can also be obtained from plant sources like shea butter.

 Derived from sheep's wool, but synthetic lanolin alternatives exist, though they are less common.

 Typically from animal hair and nails, but plant-based keratin alternatives are now available.

Can come from animal or plant sources, or be synthesized.

 Can be derived from eggs, but is more commonly sourced from soy or sunflower.
Retinol (Vitamin A): Can be animal-derived or plant-based.

 Traditionally from cow urine, but can also be extracted from comfrey root or synthesized.