Drinking olive oil on an empty stomach has the effect of replenishing nutrients, protecting the gastric mucosa, lubricating the intestines and improving constipation. When drinking olive oil on an empty stomach, the nutrients in olive oil will be effectively absorbed, so it can replenish various nutrients needed by human body. Olive oil has the function of protecting the gastric mucosa and can avoid the violation of gastric mucosa caused by gastric acid, so patients who suffer from gastritis and gastric ulcer can also drink it. Olive oil is unsaturated fatty acid, so drinking it on an empty stomach will not affect the bile secretion and will not increase the burden on the liver, so patients with liver disease and gallbladder disease can also drink it. Some people suffer from constipation and their intestinal peristalsis will be slow. When you drink olive oil on an empty stomach, it can directly enter the intestine, and because olive oil has the effect of lubricating the intestine, it can promote intestinal peristalsis and improve constipation.