2022). Subjects were randomized to receive meals after an overnight fast. The test meal consisted of 100 g of white bread, 40 g of yellow cheese, and 45 g of P. eryngii mushrooms. After 1 month of follow‐up, subjects consuming P. eryngii had reduced postprandial glucose levels and improved regulation of appetite and ghrelin levels. Ghrelin stimulates food intake, promotes adiposity, increases body weight, and elevates blood glucose. Consequently, products that alter plasma ghrelin levels can potentially contribute to obesity and diabetes (Gupta et al. 2021). The gene discussed is GHRL; the disease is obesity due to melanocortin 4 receptor deficiency.