A regulator for regulating physiological functions, such as activity of increasing an intracellular calcium ion concentration, activity of promoting growth hormone secretion, activity of promoting eating, regulatory activity relating to fat accumulation, activity of ameliorating heart function and activity of stimulating gastric acid secretion, of ghrelin, which regulator comprises a fatty acid of carbon number 2-35 or its derivative, and use thereof.本發明為關於一種可調節飢餓激素生理機能之調節劑及其用途，其中包含碳原子數2－35之脂肪酸或其衍生物，具有提高細胞內鈣離子濃度作用、促進生長激素分泌作用、促進食慾作用、調節脂肪蓄積相關作用，改善心臟功能作用及刺激胃酸分泌作用等。
