What are the efficacy and functions of Artemisia capillaris?
Under normal circumstances, the medicinal effects and benefits of Artemisia capillaris (Yin Chen) include enhancing immunity, anti-inflammatory action, clearing heat and eliminating dampness, protecting the liver, and lowering blood lipids.

1. Enhancing Immunity: The polysaccharide compounds in Yin Chen can enhance immune function by improving the body's resistance to viruses and bacteria, helping prevent illnesses such as the common cold.
2. Anti-inflammatory Effect: Yin Chen has significant anti-inflammatory properties. It can inhibit and kill various bacteria and viruses, suppress inflammatory responses, and reduce pain and swelling caused by inflammation.
3. Clearing Heat and Eliminating Dampness: Yin Chen has a bitter and cold nature. By promoting urination, it accelerates the elimination of internal damp-heat, thus achieving the effect of clearing heat and resolving dampness. It is suitable for treating symptoms such as jaundice and difficult urination caused by damp-heat.
4. Liver Protection: Yin Chen contains abundant antioxidant components such as flavonoids and terpenoids. These substances can scavenge free radicals, inhibit cellular aging, protect liver cells from damage, maintain the integrity and proper permeability of liver cell membranes, prevent hepatocyte necrosis, promote liver cell regeneration, and improve hepatic microcirculation.
5. Lowering Blood Lipids: Yin Chen can reduce levels of cholesterol and triglycerides in the blood, helping prevent atherosclerosis and cardiovascular diseases. It can also serve as an adjunctive treatment for hyperlipidemia.
Yin Chen is a commonly used traditional Chinese herb. Despite its numerous health benefits, it should be used according to medical advice. Excessive or prolonged unguided use should be avoided to prevent adverse reactions and potential harm to health.