The underlying theory of blood type diets is that people with different blood types digest lectins differently, and that if people eat food that is not compatible with their blood type, they will experience many health problems.
Leptin is a potent stimulator of the immune system. Leptin receptors on monocytes cause the release intracellularly of STAT3 which cause the monocytes to release IL-6, IL-12 and TNF alpha. The IL-6 goes to the liver and increases production of CRP.
It is your body's natural weight control mechanism. And the great thing about leptin is that it is produced naturally in the body. 1  It lets your brain know how much fat is in your body. 2  As leptin levels rise, your appetite diminishes. 3  As leptin levels fall, your appetite increases. 4  It regulates the rate of fat breakdown.