Elevated circulating long chain fatty acid concentration Increased circulating palmitate level 2019-03-09T17:54:11Z An elevation beyond the normal concentration of palmitate (palmitic acid) in the blood circulation. Palmitic acid (16:0, PA) is the most common saturated fatty acid found in the human body and can be provided in the diet or synthesized endogenously from other fatty acids, carbohydrates and amino acids. PA represents 20-30% of total fatty acids (FA) in membrane phospholipids, and adipose triacylglycerols (TAG).