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Educational profile — independent, evidence-informed overview. Not medical advice.
Talk with your healthcare provider for personalised guidance.

Family & Essentiality

  • Type: Long‑chain omega‑6 PUFA
  • Essentiality: Conditionally essential (synthesised from LA)
  • Full name: Arachidonic acid (AA)

Plain‑Language Summary

Arachidonic acid is a long‑chain omega‑6 fatty acid involved in cell signalling and inflammation regulation. It is both produced in the body from LA and obtained directly from some foods.

Molecular & Chemical IDs

  • Formula: C20H32O2; CAS 506‑32‑1
  • Structure: 20 carbons, 4 cis double bonds

Functions

  • Precursor to eicosanoids (prostaglandins, leukotrienes, thromboxanes)
  • Supports growth and repair of skeletal muscle

Absorption & Bioavailability

May increaseMay decrease
Direct dietary intake; adequate LA supplySevere essential fatty acid deficiency

Food Sources

  • Meat, poultry, eggs
  • Some fish and seafood

Evidence Snapshot

  • 🔬✅ Well‑established: role in growth, inflammation signalling, and brain development
  • 🧪⚖️ Mixed: excess relative to omega‑3 may promote pro‑inflammatory states — context dependent

References & Further Reading

  • NHMRC Nutrient Reference Values — Fats (nrv.gov.au)
  • NIH ODS — Omega‑6 Fatty Acids Fact Sheet (ods.od.nih.gov)

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