Define saturated and unsaturated fats​

Saturated fats:  Saturated fats are a type of fat-containing a high proportion of fatty acid molecules without double bonds, considered to be less healthy in the diet than unsaturated fat.

Unsaturated fats: Unsaturated fats are a type of fat-containing a high proportion of fatty acid molecules with at least one double bond, considered to be healthier in the diet than saturated fat.

it's filtration, but this is an assumption so my apologies if i got this