Non-Esterified Fatty Acid (NEFA)

Non-Esterified Fatty Acid (NEFA)

            NEFA levels in blood indicate energy 
             imbalances during transition.
  • Healthy animals typically have low NEFA concentrations in the blood
  • Animals in the transition period (3 weeks pre- to 3 weeks post-calving) may experience high NEFA concentrations due to increased energy requirements.
  • Metabolism of blood NEFA can result in fatty liver, ketosis and inflammation.
  • Animals experiencing high NEFA concentrations are also at greater risk for displaced abomasum, metritis, retained fetal membranes, lameness and even prolonged return to estrus.

Sample Type(s)

  • Blood
    • Chill samples as soon as possible after collection and expedite shipping to optimize detection


  • Test 15 cows 0-14 days pre and/or post-calving to effectively evaluate transition management program



  • Individual ELISA $15/sample
  • Testing billed upon sample receipt

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