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Other compounds & fats · FROM DR. PURSER’S TEACHING

Omega-3

A family of fats that includes ALA, EPA and DHA.

Based on teaching by Dan Purser, MD. How we prepare these guides

Updated Sep 23, 2026 · Educational reference

THE TEACHING CONNECTION

Food source, chemical form and membrane function

Food source, chemical form and membrane function

Dr. Purser’s course connects omega-3s with membranes, brain function and inflammatory/metabolic teaching. FADS1 and FADS2 add the conversion question: plant precursor fats and preformed EPA/DHA are different parts of the pathway.

Putting the pieces together

Start with the fats you eat and what your product actually contains. “Fish oil” alone does not describe its ingredients. If you take a blood thinner, review supplements with your clinician before changing them.

How supplementation is approached

Dr. Purser connects omega-3 support with membranes, metabolic patterns and brain-health teaching. Read the EPA and DHA amounts rather than just total fish-oil weight, and distinguish fish-derived products from algae-derived options. Consider FADS-related teaching and actual dietary intake without inferring a dose from genes alone.

What symptoms can—and cannot—tell you

Essential fatty-acid deficiency is uncommon but can affect skin and other tissues. ALA (omega-3) and linoleic acid (omega-6) must come from the diet. Symptoms or an individual fatty-acid measurement do not by themselves select a supplement.

Food sources

Fatty fish supply EPA and DHA. Flaxseed, chia, walnuts and certain plant oils supply ALA.

Supplement forms

Fish oil and algae-derived oils; compare the actual EPA and DHA amounts on labels.

A question to bring to your visit

What are my food sources and the EPA/DHA amounts on the label, and how do those compare with my current findings?

What to track and reassess

Track digestive tolerance and the intended goal. Review allergies, product ingredients and blood-thinner use before selecting a formulation.

From starting support to follow-up

If you and your clinician start a CMA replenishment plan, you may add one new product at a time, often waiting 3–7 days to see how you feel. A check-in is usually planned near ten weeks during an approximately 100-day period. Follow your written plan for amounts and timing. At follow-up, you may continue, change, or stop each item. This timetable does not automatically end longer-term support.

Names you may see

Omega-3