The Omega Power
Quick Answer
Omega-3 and omega-6 are essential fatty acids the body cannot make on its own — both need to come from food. Getting them from whole food sources like fatty fish, flaxseed, chia seeds, and nuts is generally more effective and safer than relying on large supplement doses.
Omega-3: the famous one
Omega-3 fatty acids are essential — the body cannot synthesize them, so they need to come from food. They come in three main forms:
- EPA and DHA: Found in fatty fish (salmon, mackerel, sardines, herring) and algae. These are the long-chain forms most actively used by the body.
- ALA (alpha-linolenic acid): Found in plant foods — flaxseed, chia seeds, hemp seeds, and walnuts. The body can convert ALA to EPA and DHA, but only in small amounts. Plant-based eaters may want to discuss their DHA intake with a registered dietitian.
Omega-3 supplements — fish oil, algae oil — are widely marketed. The NIH notes they may have modest effects on blood triglycerides, but the research on broader benefits is more complex. They are not a guaranteed shield against any specific condition.
If you are pregnant, take blood-thinning medications, or have a seafood allergy, discuss omega-3 supplementation with a healthcare professional before starting.
Omega-6: not the bad guy
Omega-6 fatty acids are also essential. They are found in nuts, seeds, vegetable oils, and many packaged and processed foods. Linoleic acid (LA) is the most common dietary omega-6.
You may have heard that the modern diet contains too much omega-6 relative to omega-3. The concern is not that omega-6 fats themselves are harmful — they are an essential part of normal function — but that an overall dietary pattern heavy in ultra-processed foods may lack balance in multiple ways, including fatty acid variety.
The useful response is not to fear vegetable oils or nuts, but to focus on overall dietary quality: more whole foods, more variety, fewer ultra-processed products.
A practical plate approach
You do not need a complicated tracking system to include omega-3 and omega-6 fatty acids in your diet. Here is a practical approach:
- Include fatty fish (salmon, mackerel, sardines) a couple of times per week if you eat fish.
- Add chia seeds, ground flaxseed, hemp seeds, or walnuts to meals regularly if you prefer plant sources.
- Choose whole food fat sources (avocado, nuts, seeds, olive oil) over highly processed snacks most of the time.
- Cook with the oils that suit your meal — no single oil is obligatory.
- Avoid large, unguided supplement doses. The FDA recommends no more than 3 grams per day of EPA and DHA combined from all sources, with up to 2 grams from supplements.
Eating fatty fish twice a week — or including flaxseed, chia, and walnuts daily for plant-based eaters — is a practical, evidence-informed way to support omega-3 intake without relying on supplements.
Frequently Asked Questions
What are omega-3 and omega-6 fatty acids?
Omega-3 and omega-6 are essential fatty acids, meaning the body cannot make them on its own — they must come from food. Omega-3s (EPA, DHA, ALA) are found in fatty fish and plant seeds; omega-6s (linoleic acid) are found in nuts, seeds, and vegetable oils. Both play important roles in normal body function.
What are the best food sources of omega-3?
Fatty fish — salmon, mackerel, sardines, herring — are the richest sources of EPA and DHA. Plant-based sources include flaxseed, chia seeds, hemp seeds, and walnuts, which provide ALA. The body converts ALA to EPA and DHA in small amounts, so plant-based eaters may want to consider algae-based DHA supplements.
Should I take omega-3 supplements?
For most people who eat fish regularly, food sources are sufficient. If you do not eat fish, an algae-based DHA supplement may be worth discussing with a registered dietitian. The FDA recommends no more than 3g/day of EPA+DHA combined, with up to 2g from supplements. Consult your provider if you take blood thinners or are pregnant.
Are omega-6 fats bad for you?
No. Omega-6 fatty acids are essential nutrients. The concern with some modern dietary patterns is not omega-6 itself but the overall imbalance that comes with eating many ultra-processed foods at the expense of whole food variety. Nuts, seeds, and unrefined oils that contain omega-6 are part of a healthy dietary pattern.
What is the difference between ALA and EPA/DHA?
ALA (alpha-linolenic acid) is a plant-based omega-3 found in flax, chia, hemp, and walnuts. EPA and DHA are long-chain omega-3s found in fatty fish and algae. The body can convert ALA to EPA and DHA but only in small amounts — which is why direct sources of EPA and DHA are often recommended, especially for people who do not eat fish.
Sources and Further Reading
- NIH Office of Dietary Supplements — Omega-3 Fatty Acids (Health Professional Fact Sheet)
- NIH Office of Dietary Supplements — Omega-3 Fatty Acids (Consumer Fact Sheet)
Editorial policy: Life Synergy Retreat links only to peer-reviewed research and government health agencies. This article was last reviewed in October 2026.
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