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Fatty Acid

Total Omega-3 Fatty Acids

Also known as: omega-3, n-3 polyunsaturated fatty acids, n-3 PUFA, total omega-3

A
Evidence

The collective measurement of omega-3 polyunsaturated fatty acids, including EPA (eicosapentaenoic acid), DHA (docosahexaenoic acid), and ALA (alpha-linolenic acid), which are essential fatty acids critical for cardiovascular, neurological, and inflammatory health. Supplements typically list total omega-3 content alongside individual EPA/DHA amounts.

Primary uses

  • cardiovascular health
  • triglyceride reduction
  • brain and cognitive function
  • inflammatory response modulation
  • eye health support
  • mood and mental health

How it works

  • substrate for anti-inflammatory mediator production (resolvins, protectins)
  • incorporation into phospholipids in cell membranes
  • modulation of gene expression related to lipid metabolism
  • improvement of endothelial function
  • reduction of platelet aggregation
  • NLRP3 inflammasome inhibition

Dosage

Typical range
500-4000 mg daily total omega-3 (composition varies: typically 300-2000 mg EPA+DHA combined)
Timing
with largest meal of the day
With food
absorption substantially improved when taken with meals containing dietary fat
Duration
minimum 4-12 weeks for measurable cardiovascular/triglyceride effects; long-term use (6-24 months) typically required for cognitive or anti-inflammatory outcomes
Special populations
pregnant/nursing women: 200-300 mg DHA daily recommended; older adults: may derive greater cardiovascular benefit; individuals with familial hypertriglyceridemia: higher doses (2-4g daily) used under medical supervision

Forms

  • fish oil softgels· 70/100
  • liquid concentrate· 70/100
  • algae-based DHA· 70/100
  • plant-based ALA sources· 70/100
  • krill oil· 70/100

Safety

Common side effects

  • minor GI upset (nausea, loose stools)
  • fishy aftertaste (fish oil source)
  • mild headache (uncommon)

Contraindications

  • active hemorrhage or severe bleeding disorder
  • scheduled surgery within 1 week (may increase bleeding risk)
  • allergy to fish or marine organisms (fish oil source)

Evidence notes

Robust RCT evidence from major cardiovascular trials; consistent meta-analyses demonstrate benefits for triglycerides and cardiovascular outcomes. EPA+DHA efficacy best established at 2-4g daily; ALA evidence more modest.

Grade A: Multiple well-designed human trials support the main claims.

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Medical disclaimer. This page is educational and does not replace advice from a qualified healthcare provider.