The hormone leptin is produced by cells in the small intestine and adipose tissue; it aids in maintaining a healthy
energy balance by reducing food intake, which in turn reduces fat mass in adipocytes. The ventromedial and arcuate nuclei,
along with other regions of the hypothalamus and the ventral tegmental area, which is responsible for feeding, have specialized
receptors for leptin. In addition to its involvement with fat cells, it is involved in other regulatory elements, including obesity.
The purpose of this research was to assess leptin levels and other biochemical parameters in healthy male athletes from Kirkuk,
Iraq, who smoked cigarettes. Within the same age range, the research included (40) current smokers and (40) healthy nonsmokers. We used an ELISA reagent from Sunlong Biotech in China to measure serum leptin levels, and kits from Giesse
Diagnostics srl in Italy to measure C-reactive protein, glucose, calcium, cholesterol, triglycerides, and high-density lipoprotein
(HDL). Mathematical measurements were taken for LDL and VLDL, which stand for very-low-density lipoprotein. While the
levels of leptin were not significantly different between athletes who smoked and those who did not, the levels of C-reactive
protein, glucose, triglycerides, LDL, and VLDL were significantly higher in the former group. There was also a significant
decrease in calcium content.