What are the primary components of egg yolk and peanut oil?

The primary components of egg yolks and peanut oil are lipids. Lipids are different kinds of substances like sterol and triglycerides. A large egg yolk contains about 210 milligrams of cholesterol, and 100 grams of peanut oil contains about 17 grams of saturated fats. While cholesterol is a type of sterol, saturated fats are triglycerides.