Omega-3
Omega-3s (ω-3) are a family of unsaturated fatty acids which have in common a carbon–carbon double bond in the n-3 position; the third bond from the end of the fatty acid. Omega-3s fatty acids are considered essential because the human body requires them but is unable to make sufficient quantities. For this reason, omega-3 fatty acids must be obtained through the diet or supplementation.
 
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