Several scientific studies show that consuming or inhaling grapefruit oil can encourage weight loss by activating an enzyme called AMP-activated protein kinase, which is usually activated during exercise to help your muscles use stored fat and sugar for energy. When AMPK is activated, it boosts your metabolism by promoting the body’s energy-producing processes.
Grapefruit oil works as a natural appetite suppressant because it helps to improve insulin resistance and balance blood glucose levels, which helps you feel fuller. Grapefruit oil also helps you fight cravings because of its ability to regulate hunger hormones, improve your mood (reducing emotional cravings) and boost your energy levels (eliminating cravings triggered by sleepiness or exhaustion). Additionally, research shows that the scent of grapefruit oil affects the autonomic nerves and enhances lipolysis, which is the breakdown of fats.