supplements.The name “polyunsaturated” is derived from their chemical composition where “poly” stands for “many,” and “unsaturated” explains the double bonds they contain.
This means that omega fatty acids have many of these bonds. There are also “monounsaturated” fats that contain only one double bond.The position of the first double unsaturated bond from the end of the molecular chain (the omega) is what determines whether that’s an omega-3, omega-6, or omega-9 fatty acid.For example, in omega-3, the first double bond is found on the third carbon atom, counting back from the molecular tail, and in omega-6 and -9 on the sixth and ninth carbon atom, respectively.
Read more on lifehack.org