11. The presence of free fatty acids increases the level of phosphorylation, thereby decreasing PDH activity. 12. They activate phospholipidase to release AA from neuron cell membranes as a free fatty acid . 13. Medium-chain free fatty acid ( FFA ) with carbon chain lengths of C9 to C14. 14. They then refine the oil to remove certain free fatty acids to reduce susceptibility to rancidification. 15. These free fatty acids spur production of cathelicidin, HBD1, and HBD2, thus leading to further inflammation. 16. In addition, injection of FGF21 was associated with decreased circulating insulin and free fatty acid levels. 17. The breakdown of triglycerides by adipose tissue into free fatty acids and glycerol is also inhibited. 18. In contrast to most lactic acid bacteria, this bacterium mainly breaks down lipids, forming free fatty acids . 19. There is a constant flux of FFA ( Free Fatty Acids ) entering and leaving adipose tissue. 20. During fasting, the normal conversion of triglycerides to free fatty acids , ketones, and ultimately acetyl-CoA is impaired.