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Gelatin – Animal‑derived capsule or coating material (excipient, carrier)Gelatin is a protein ingredient obtained by partial hydrolysis of collagen, typically sourced from animal tissues such as bovine, porcine, or fish skin and bones. During processing, long collagen chains are broken down in a controlled way, yielding a soluble, gel‑forming material that solidifies at lower temperatures and liquefies again at body temperature. Within dietary supplements, gelatin is mainly used to manufacture hard capsules and softgels, but it can also act as a binder or coating in tablets and occasionally as a thickener in powders or liquids. Although gelatin provides amino acids, in this context it is regarded primarily as a technological excipient, not as an active nutrient or medicinal substance.Origin, properties, and compositionThe starting point for gelatin is animal collagen, most commonly from bovine or porcine sources, although fish gelatin may be used for certain products or markets. During production, collagen is purified and hydrolysed, then processed into a standardized gelatin that meets quality and safety requirements for food and supplement use. Gelatin is characterized by its ability to form a clear, elastic gel that is solid at cool temperatures and dissolves again when warmed. In capsule shells, this behavior provides enough mechanical strength to protect the fill material, while still allowing the shell to disintegrate reliably in the gastrointestinal tract so the active ingredients can be released. Key parameters such as gel strength, viscosity, and dissolution profile can be tailored to the intended application, for example for hard gelatin capsules versus soft gelatin capsules.Role in dietary supplementsIn supplement formulations, gelatin performs several functions: it forms the capsule shell of hard and soft capsules, acts as a binder to hold tablet cores together, and can be used as a film coating that smooths the tablet surface and masks taste or odour. By creating a protective barrier, gelatin helps shield sensitive ingredients from oxygen, moisture, and light, thereby supporting product stability and shelf life. For users, gelatin capsules improve swallowability due to their smooth surface and enable accurate dosing, since each capsule can be filled with a precise amount of active ingredients. The amount of gelatin ingested via capsules is generally not counted as a significant protein source in the diet.Use, labelling, and practical considerationsOn supplement labels, gelatin typically appears in the ingredient list as “gelatin” or “capsule: gelatin”, sometimes with specification of the animal source (e.g. bovine gelatin, porcine gelatin) where this is important for certain consumer groups. Because it is derived from animals, gelatin is not suitable for vegetarians or vegans, and religious dietary rules (such as halal or kosher requirements) may also influence product choice. Consumers who wish to avoid gelatin can look for products that use plant‑based capsule materials such as HPMC or other cellulose derivatives instead. In the amounts commonly used in supplements, gelatin is generally considered well tolerated; however, individuals with specific dietary restrictions, allergies, or religious considerations should check the declared source and, if in doubt, seek advice from a healthcare professional. In all cases, gelatin functions in supplements as a delivery aid and protective material: it does not act as a medicine and does not replace a varied diet or medical diagnosis and treatment.