Omega-3 Fatty Acids: What They Are, Why You Need Them, and How to Get Enough

A foundational nutrient for brain health, inflammation control, and heart support

If there’s one supplement that nearly every expert agrees on, it’s omega-3 fatty acids. Known for their role in brain, heart, and joint health, these essential fats can have a powerful impact on inflammation, mood, cognition, and even metabolic function.

But there’s more to omega-3s than fish oil capsules. Let’s explore what they are, how they work, where to find them — and how to supplement effectively.


🧠 What Are Omega-3s?

Omega-3 fatty acids are a type of polyunsaturated fat. The three main forms are:

  • ALA (alpha-linolenic acid) — found in plants
  • EPA (eicosapentaenoic acid) — found in fish
  • DHA (docosahexaenoic acid) — found in fish and algae

ALA is useful, but EPA and DHA are the heavy hitters, especially for anti-inflammatory and brain-supportive functions.

🔗 Harvard Health – Omega-3 Fatty Acids


💪 What Omega-3s Help With

  • Reduce chronic inflammation
  • Support brain health and focus
  • Improve mood and emotional balance
  • Protect the heart and blood vessels
  • Enhance skin and joint health
  • May support fat metabolism and body composition

Some research also links omega-3s to reduced risk of:

  • Depression
  • Alzheimer’s disease
  • ADHD symptoms
  • Autoimmune conditions

🔗 NIH – Omega-3 Supplement Research


❗ Signs You May Be Deficient

  • Brain fog or poor memory
  • Dry, flaky skin
  • Fatigue
  • Mood swings or mild depression
  • Joint pain or stiffness

🐟 Best Food Sources

FoodEPA + DHA content (approx.)
Mackerel (100g)4,000 mg
Salmon (100g)2,000–2,500 mg
Sardines (100g)2,200 mg
Anchovies (100g)2,000 mg
Herring (100g)1,900 mg
Omega-3 eggs300–500 mg per egg

Plant-based ALA sources: flaxseeds, chia seeds, walnuts — useful, but less efficiently converted to EPA/DHA.


💊 What to Know About Supplementing

  • Dose: 1,000–3,000 mg combined EPA + DHA per day is common
  • Form: triglyceride form (natural) is better absorbed than ethyl ester form
  • Timing: take with meals, preferably meals containing fat
  • Vegan options: Algae oil (pure DHA or DHA + EPA formulas)

Look for:

  • Third-party tested for purity (heavy metals, oxidation)
  • Clear EPA/DHA ratios (not just “fish oil” mg)

Recommended brands often include: Nordic Naturals, Carlson Labs, Ovega-3 (vegan)


⚠️ Watch Out For

  • Slight blood thinning — talk to your doctor if you’re on anticoagulants
  • Low-quality fish oils can be oxidized or poorly absorbed
  • Fish burps? Try enteric-coated or emulsified formulas

Final Thoughts

Omega-3s are one of the most well-researched, foundational supplements for daily health. Whether through food or supplements, ensuring you get enough can support your brain, heart, joints, and mood in powerful ways.

A strong mind starts with a well-fed brain — and omega-3s are brain food, pure and simple.