Omega-3 fatty acid

fatty acids with a double bond (C=C) at the third carbon atom from the end of the carbon chain

Omega-3 fatty acids are polyunsaturated fatty acids. They have a double bond three atoms away from the end methyl group.

The most common sources for plant oils are walnuts, hemp oil and flaxseed oil. Sources of animal omega-3 fats include eggs, squid oils and fish.

Dietary supplementation does not affect the risk of cancer, heart disease or death.[1]

They are not a main treatment for attention deficit hyperactivity disorder (ADHD), autism and other developmental disabilities. However, omega-3 supplements are often given to children with these conditions.[2]

Chemical structure of α-linolenic acid (ALA), a fatty acid with a chain of 18 carbons with three double bonds on carbons numbered 9, 12, and 15.


  1. "Omega-3 Fatty Acids". The National Institutes of Health. Retrieved May 14, 2021. Cite journal requires |journal= (help)
  2. "Novel Treatment for Autistic Spectrum Disorders". Wiley Online. Retrieved May 14, 2021. Cite journal requires |journal= (help)