Taurine
Taurine is now widely recognised as an essential nutrient for cats—but this wasn’t always the case. In the 1980s, its importance came to light following widespread cases of feline diseases linked to Taurine deficiency, including blindness caused by central retinal degeneration and heart failure from feline dilated cardiomyopathy. Since then, the role of Taurine in feline health has been more thoroughly understood, and its inclusion in cat food is now considered non-negotiable.
What is Taurine and why is it essential for cats?
Taurine (2-aminoethanesulfonic acid) is a naturally occurring sulfonic acid, often loosely called an amino acid, though it is not one in the strict biochemical sense. It is widely distributed in animal tissues and plays many critical roles in the body, including bile acid conjugation, eye and heart health, reproduction, and cellular hydration. While many mammals can synthesise Taurine from the amino acid cysteine in the pancreas, cats cannot produce enough to meet their needs. As obligate carnivores, cats have evolved to rely on dietary Taurine, which is naturally abundant in raw meat.
Synthetic Taurine supplementation
The Taurine used in TCfeline is a highly purified, synthetic form, manufactured through a reaction of ethylene oxide with sodium bisulfite in water. Most of the world’s Taurine production comes from China, followed by Japan. After the 2011 Fukushima Daiichi nuclear accident, consumer demand for Japanese-sourced Taurine declined. This left China as the most viable source.
Concerns regarding Chinese-made ingredients are understandable, especially following the 2007 recall of melamine-tainted wheat gluten and vegetable proteins. However, the Taurine used in TCfeline is manufactured by a reputable supplier and is tested to ensure it is free from contaminants, including melamine.
How much Taurine is in TCfeline?
The TCfeline premix is carefully fortified with Taurine to meet and exceed the dietary needs of cats. The final food made with TCfeline contains Taurine levels slightly higher than those found in whole prey (such as mice) to account for some loss during food handling and storing. The amount of Taurine in TCfeline delivers over three times the minimum daily requirement for adult cats set by research. But, taurine is water-soluble and not stored in the body, so excess amounts are excreted in the urine. Studies show that the safe upper limit of Taurine intake for cats is more than six times the amount found in prey, but there is no need to add more beyond what is in the TCfeline premix.
Does freezing destroy Taurine?
There is no scientific evidence to support the claim that freezing destroys Taurine. On the contrary, multiple studies report that Taurine remains stable during freezing. My own experience aligns with this: laboratory analysis of frozen mouse samples (stored for up to three months) confirmed normal Taurine levels.
Freezing is a physical phase change that slows enzymatic activity and microbial growth, preserving nutrients rather than degrading them. If freezing destroyed delicate molecules, it would not be used to preserve sperm, embryos, or other biologically active samples. While long-term freezing may reduce food quality due to slow oxidative changes or freezer burn, nutrient losses—particularly of stable compounds like Taurine—are minimal during the relatively short storage time of homemade cat food.
In summary
Taurine is a vital nutrient that supports heart, eye, reproductive, and immune health in cats. Because cats cannot produce enough of it on their own, it must be provided in the diet. The Taurine in TCfeline is of pharmaceutical-grade quality, free from contaminants, and supplied in a safe and effective amount. The formulation ensures that Taurine levels remain adequate from preparation through to feeding—providing reliable nutritional support without the need for further supplementation.
