Animal fat includes subcutaneous, intermuscular, and intramuscular (marbling) adipose tissues (Rhee et al., 2000), containing mostly triglycerides (neutral lipids) and a small amount of phospholipids (polar lipids). 

Fat in meat animals consists mostly of triglycerides, acquired from dietary sources, and fatty acid de novo synthesis (Bravo-Lamas et al., 2018). Lipid-derived flavor compounds include aldehydes (alkanals), ketones, carboxylic acids (alkanoics), alcohols (alkanols), lactones, and alkylfurans (Mottram, 1998).