The functional nutritional and regulatory activities of calcium supplementation from eggshell for obesity disorders management

The present study was to investigate the effective role of renewable sources of Ca+2 from eggshell (ES) with different doses to restrict obesity disorders. Rats were classified as follows, G1: normal diet for 26 weeks; G2: high‐fat diet (HFD) for 26 weeks; G3, G4, and G5 were supplemented with HFD for 16 weeks and treated with 7.2 g Ca+2 ES/Kg rat chow, 18 g Ca+2 ES/Kg rat chow, and 2% diet containing fat (DCF), respectively, for the remaining 10 weeks. Results revealed a significant effect of the low dose of Ca+2 supplement in form of ES than high dose and 2% DCF; on basis of anthropometric parameters, lipid, leptin, adiponectin, thyroid hormones, Ca+2, 25‐hydroxyl vitamin‐D, and oxidative and inflammatory parameters were regulated. Results were confirmed with the histopathological study. Therefore, it was concluded that Ca+2 supplementation can be used as a beneficial source for obesity management with anticholesterol actions. Practical applications Obesity represented public health hazards. The eggshell is one of the waste products that contain a high percentage of Ca+2. The current data exposed using a low dose of ES as a new source of Ca+2 supplement for treatment of HFD rats leads to significant enhancement of lipid profiles, liver enzymes, kidney functions, leptin, adiponectin, Ca+2, 25(OH)‐D, TSH, fT4, and PTH levels. Also, there was a reduction in weight gain, Bwt, BMI, BG, insulin, and HOMA‐IR. Moreover, the oxidant‐pro‐oxidant system was improved in both hepatic and adipose tissues where NO and TBARS concentrations were diminished, and SOD specific activity was elevated. Additionally, TNF‐α and ADAM17 expression were downregulated. Hence, it was concluded that there was good evidence that diets supplemented with ES were associated with the reduction of obesity complications especially regulating fat processing and storage in the body. Low dose of egg calcium shell induce calcium homeostasis is very crucial for body weight control and triggering the action of leptin and adiponectin. Coincidence activity of the calcium content and vitamin D in acceleration of the metabolic rate for obesity and decreasing the rate of body weight gain. Regulating metabolic disorders and inflammatory signal pathways of obesity by homeostatic action of calcium and vitamin D which down regulated the inflammation level and decreased the adiposity in liver.