Gelatin

This ingredient is only present in TCfeline Original.

Gelatin is a functional ingredient derived from collagen—the structural protein found in connective tissues. It consists of peptides and proteins produced through the partial hydrolysis of collagen-rich materials. In food-grade applications, gelatin is typically extracted from pork skin or beef hide, though it can also be rendered from bones and connective tissues of other animals, including poultry and fish.

The gelatin used in TCfeline is 100% sourced from pork skin. This choice is intentional and precautionary: it eliminates any risk of contamination with prions associated with Bovine Spongiform Encephalopathy (BSE)—a transmissible disease affecting cattle that, in rare cases, may impact humans or possibly cats. Using pork-derived gelatin ensures safety while maintaining functionality.

Nutritional and functional roles

Gelatin is composed of nearly 99% protein, though its amino acid profile is low in essential amino acids—except for arginine, which it provides in meaningful amounts. In the feline diet, its primary nutritional role is not to supply complete proteins but to serve as a source of metabolically useful amino acids for energy production. Cats rely on protein not only for structure and repair but also for maintaining blood glucose via gluconeogenesis.

Beyond its nutritional value, gelatin plays an important functional role as a hydrophilic colloid (hydrocolloid), helping to stabilise the physical properties of the food once ingested. In the stomach, this means the food mixture remains uniform rather than separating into distinct components. Gastric secretions are absorbed more evenly into this cohesive mass, facilitating smoother digestion and more consistent gastric emptying. In my own observations, including gelatin in the diet has significantly reduced food regurgitation in cats.

Gut health and digestive support and tissue repair

Gelatin’s short peptides, known as glyprolines—comprised of glycine and proline—have been shown to help protect and repair the stomach’s mucosal lining. Research conducted by scientists at the Russian Academy of Sciences and Lomonosov Moscow State University has demonstrated the protective effects of these peptides against mucosal injury and ulceration, adding further value to gelatin’s inclusion in the diet.

Though not a classic prebiotic, gelatin indirectly supports gut health. glyprolines can be utilised as substrate by beneficial gut microbes in the intestines, contributing to a healthy microbial balance. Gelatin also supports the structural integrity of the gut lining and may help reduce inflammation in the gastrointestinal tract.

Together, these properties reinforce the role of gelatin in maintaining digestive health throughout the gastro-intestinal tract.

Support for joints and connective tissue

Gelatin’s composition closely resembles that of the connective tissues and skin found in whole prey. It contains collagen-based structures that support joint and musculoskeletal health, especially in ageing or active animals. A study conducted at Ball State University found that gelatin supplementation helped reduce joint stiffness and knee pain in athletes—suggesting broader applications for connective tissue support.

In summary

While gelatin is not included in TCfeline as a primary source of essential amino acids, it plays a valuable role in supporting digestion, gut integrity, and connective tissue health. Its presence mirrors elements of a natural prey-based diet, particularly the collagen-rich parts often underrepresented in conventional meat cuts like connective tissue and skin. As with all ingredients in the TCfeline premix, gelatin is included with clear purpose and proven benefit.