Onions have a very strong irritating effect, but this irritation is harmless to the human body because it is beneficial volatile substances that have a certain therapeutic effect on some diseases. For example, onions are often boiled into water for drinking, which has the effect of removing dampness and relieving cough. Let’s take a look at whether the water of onions is effective in treating wind-heat cough and what other effects it has.

Onions have the effect of dispelling wind and cold due to the presence of a fatty volatile substance called propylthiouracil in the bulbs and leaves of onions.

Onions are nutritious and have a spicy smell. They can stimulate the secretion of the stomach, intestines, and digestive glands, increase appetite, promote digestion, and onions do not contain fat. The essential oil contains a mixture of sulfur-containing compounds that can reduce cholesterol.

Onions are the only known food to contain prostaglandin A. Prostaglandin A can dilate blood vessels, reduce blood viscosity, thus it can lower blood pressure, reduce peripheral blood flow, and increase coronary blood flow, and prevent thrombosis. It can also counteract the effects of substances such as epinephrine in the human body that increase blood pressure, and promote the excretion of sodium salts, thereby lowering blood pressure.

Onions have a certain stimulating effect. They can help cells better utilize glucose, lower blood sugar, supply heat energy to brain cells, and are a good food for diabetes and patients with fatigue.

Onions contain a substance named ‘quercetin’, which is one of the most effective natural anticancer substances currently known. It can prevent the biochemical mechanisms in the body from mutating, control the growth of cancer cells, and thus has the effects of preventing and treating cancer.