Optimal Health Daily - Fitness and Nutrition 3305: Everything You’ve Ever Wanted to Know About Omega 3 Fatty Acids by Danielle Omar of Food Confidence
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Feb 24, 2026 A clear breakdown of what omega‑3 fatty acids are and how their structure defines ALA, EPA, and DHA. A rundown of the main health areas they support, from brain and heart to joints and fetal development. Practical food sources and tips for getting enough omega‑3s through daily choices.
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What Defines Omega 3 Fatty Acids
- Omega-3s are essential polyunsaturated fats defined by a double bond at the third carbon from the acid end.
- Fatty acids join into triglycerides and the omega number (3 or 6) depends on double-bond position in the chain.
ALA Conversion To EPA And DHA Is Inefficient
- There are three main omega-3s: ALA, EPA, and DHA with ALA being the most common plant form.
- The body inefficiently converts ALA into active EPA and DHA, so ALA-rich foods often don't supply enough active omega-3s.
EPA And DHA Serve Different Critical Roles
- EPA reduces inflammation and supports brain health while DHA is critical for nerve cells in brain and retina.
- EPA and DHA are mainly found in animal sources like fatty fish, meat, eggs, and some dairy.