Arachidonic acid (AA) is an omega-6 fatty acid that cats absolutely must obtain from animal-based foods — this is one of the clearest markers of their obligate carnivore status. Dogs, humans, and most other mammals can convert linoleic acid (a common plant-based omega-6 found in vegetable oils) into arachidonic acid through a series of enzymatic steps, but cats lack sufficient delta-6-desaturase enzyme activity to perform this conversion efficiently. Arachidonic acid is a building block for prostaglandins, thromboxanes, and leukotrienes — signaling molecules that regulate inflammation, blood clotting, kidney function, and reproductive processes. It is critical for maintaining skin barrier integrity, supporting proper platelet aggregation (blood clotting), enabling normal kidney blood flow, and ensuring healthy reproduction in breeding cats. Because arachidonic acid is found almost exclusively in animal fats (particularly poultry fat, egg yolks, and organ meats), any diet that replaces animal fat with plant-based oils will leave a cat dangerously deficient in this essential nutrient.
A single cooked egg yolk provides roughly 80–100mg of arachidonic acid — your adult cat needs approximately 6–30mg per day, which is easily met by any diet containing even moderate amounts of animal fat. Chicken thigh meat, egg yolks, and organ meats are the richest natural sources. Commercial cat foods formulated with animal-based fats will meet this need comfortably, but vegan or plant-heavy diets cannot provide arachidonic acid naturally and require synthetic supplementation.
0.06% of daily nutrient intake
Arachidonic Acid makes up 0.06% of your cat's total daily nutritional requirements by weight. That's a tiny amount — but it matters.
Poor skin condition including flaky, dry skin and a rough coat, impaired wound healing, reproductive failure (infertility, poor kitten survival), abnormal platelet aggregation leading to excessive bleeding from minor injuries, and in severe cases, compromised kidney function. Deficiency typically develops slowly over weeks to months on a plant-fat-heavy or very low-fat diet.
Excessive arachidonic acid can promote chronic inflammation, since its metabolites include pro-inflammatory compounds. However, dietary excess from normal food sources is uncommon in cats eating a balanced diet. The bigger concern is the ratio of arachidonic acid (omega-6) to omega-3 fatty acids — too much omega-6 relative to omega-3 can tip the inflammatory balance in an unhealthy direction.
| Life Stage | Size | Min | Max | Unit | Notes |
|---|---|---|---|---|---|
| Adult | — | 6 | 30 | mg | Adult cats require a continuous dietary supply of arachidonic acid since they cannot synthesize it from linoleic acid. |
| Juvenile | — | 6 | 40 | mg | Kittens need arachidonic acid for proper development of skin, inflammatory pathways, and reproductive organs. |
| Pregnant / Nursing | — | 10 | 50 | mg | Pregnant and nursing queens need more arachidonic acid for fetal development and reproductive health. |
| Senior | — | 6 | 30 | mg | Senior cats maintain the same arachidonic acid needs as adults. Any animal-fat-containing diet should meet this. |
Source: NRC 2006, AAFCO 2024
Arachidonic acid (omega-6) and omega-3 fatty acids compete for the same enzymatic pathways. The ratio between them influences the body's inflammatory balance: more omega-6 promotes inflammation, more omega-3 reduces it.
What this means: While cats absolutely need arachidonic acid (they cannot synthesize it), balancing it with omega-3s from fish helps prevent excessive inflammation. A diet including both poultry fat (arachidonic acid) and fish (omega-3s) achieves a healthy balance naturally.
