Researchers identify unique fatty acid signature in cat urine
Scientists from Iwate University in Japan and international partners discovered a specific chemical marker in cat urine on September 20, 2026.
Durable chemical signature found
The study identified 13 branched-chain fatty acids that form a consistent mixture within each individual animal. These compounds remain stable over time even though other odor molecules typically evaporate or break down quickly. The specific proportions of these acids vary between cats but stay constant for the same cat.
Link to kidney droplets
Researchers found that these unusual fatty acids appear connected to mysterious fat droplets located in the kidneys. This discovery suggests a scent-recognition system that may be shared across the entire cat family. Behavioral tests confirmed that cats can use this lasting chemical signature to identify one another.
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