Gelatin

Gelatin is a translucent, colorless, flavorless protein derived from the partial hydrolysis of collagen, a structural protein found in animal connective tissues such as skin, bones, and cartilage. Consumers commonly encounter gelatin as a gelling agent in desserts like Jell-O, panna cotta, and marshmallows, as well as in gummy candies, yogurt, and some ice creams. It also appears in non-food products, including pharmaceutical capsules, photographic film, and cosmetics, where it serves as a stabilizer or thickener.

In industrial practice, gelatin is produced by boiling animal by-products—primarily from pigs and cows—in water, a process that breaks collagen into smaller protein chains. The resulting liquid is filtered, concentrated, dried, and ground into a powder or formed into sheets. Gelatin's unique ability to form a thermoreversible gel means it melts at body temperature, providing a desirable mouthfeel in foods. Its setting properties depend on bloom strength, a measure of gel firmness, with higher bloom values yielding stiffer gels.

For consumers, gelatin matters because it is an animal-derived ingredient, making it unsuitable for vegetarians, vegans, or those avoiding pork or beef for religious or ethical reasons. While gelatin itself has no significant nutritional value beyond protein, its presence in many processed foods can be hidden under ingredient names like "hydrolyzed collagen" or "gelatine." Alternatives such as agar-agar, carrageenan, and pectin offer plant-based gelling options, though they may produce different textures or require different preparation methods.